正解：

See the Explanation below for complete solution.
Explanation:
Task 2 - Create Subaccounts in a Directory
You must create these two subaccounts inside the Partner directory:
AM PA Dev Test
AM PA Prod
Important:
Replace #### with your global account number
Enter all names and subdomains exactly
Be careful with hyphens and spaces
AM PA Prod must be marked as used in production
Before You Start
Log in to SAP BTP Cockpit.
Open your correct Global Account.
Go to Directories.
Open the Partner directory.
Why this matters:
Both subaccounts in this task must be created inside the Partner directory. If you create them under the global account or another directory, the task will be wrong.
Step 1 - Open the Partner Directory
What to do
In the left menu, click Directories.
In the directory list, select Partner.
Explanation:
The Partner directory is the container where both required subaccounts must be created.
What to verify
You should now be inside the Partner directory page.
Step 2 - Start Creating the First Subaccount
What to do
Inside the Partner directory, go to Subaccounts.
Click Create → Subaccount.
Explanation:
This opens the subaccount creation screen.
What to verify
You should now see the form for creating a new subaccount.
Step 3 - Enter Data for AM PA Dev Test
What to do
Enter the following values:
Display Name / Name: AM PA Dev Test
Description: Partner Development and Testing
Subdomain: btpops####-am-pa-dev-test
Then choose the region:
Cloud Provider: Microsoft Azure
Region: US West (WA)
Environment / Technical Region: cf-us20
After checking all values, click Create.

Explanation:
This creates the development and testing subaccount for the Partner directory.
The important points are:
the subaccount name must match exactly
the subdomain must include your account number in place of ####
the region must be Microsoft Azure → US West (WA) cf-us20
What to verify
After creation, you should see the new subaccount:
AM PA Dev Test
inside the Partner directory.
Step 4 - Confirm the First Subaccount Exists
What to do
Check the subaccounts list under Partner.
Explanation:
Before creating the production subaccount, confirm that AM PA Dev Test was created successfully, because it will be used as the source subaccount for the next step.
What to verify
You should see:
AM PA Dev Test
If it is not there, do not continue until it is created correctly.

Step 5 - Start Creating the Second Subaccount
What to do
Still inside the Partner directory, click Create → Subaccount again.
Explanation:
This opens a new subaccount creation form for the production subaccount.
Step 6 - Enter Data for AM PA Prod
What to do
Enter the following values:
Display Name / Name: AM PA Prod
Description: Partner Production
Subdomain: btpops####-am-pa-prod
Then set:
Source Subaccount: AM PA Dev Test
Enable the production setting:
Used in Production: Yes
Then click Create.

Explanation:
This creates the production subaccount by using AM PA Dev Test as the source subaccount.
Using a source subaccount means SAP BTP copies base settings from the selected source, which helps keep configuration aligned.
The production indicator is mandatory here because this is the production subaccount.
What to verify
After creation, you should see:
AM PA Prod
inside the Partner directory, and it should be marked as a production subaccount.
Final Expected Result for Task 2
Inside the Partner directory, you must have these two subaccounts:
1. AM PA Dev Test
Description: Partner Development and Testing
Subdomain: btpops####-am-pa-dev-test
Region: Microsoft Azure → US West (WA) cf-us20
2. AM PA Prod
Description: Partner Production
Subdomain: btpops####-am-pa-prod
Source Subaccount: AM PA Dev Test
Used in Production: Yes

Common Mistakes to Avoid
1. Creating the subaccounts in the wrong place
Both subaccounts must be created in:
Partner directory
Not in:
Global Account
Americas
Eurasia
Human Resources
2. Wrong subdomain format
Use exactly:
btpops####-am-pa-dev-test
btpops####-am-pa-prod
Replace only #### with your global account number.
Do not:
remove hyphens
add spaces
misspell dev-test or pa-prod
3. Wrong region for AM PA Dev Test
It must be:
Microsoft Azure
US West (WA)
cf-us20
4. Forgetting the source subaccount for AM PA Prod
You must select:
AM PA Dev Test
as the source subaccount.
5. Forgetting the production flag
For AM PA Prod, make sure:
Used in Production is enabled