To extend a dimension in a newly created subject area by adding new attributes from another data source, which steps are required?

• A. Create a branch and add "Extend a Dimension"
• B. Delete the data source
• C. Rename the dimension
• D. Extend a Dimension automatically

Answer: (A)

To add new attributes from another data source to a dimension in a newly created subject area, you start by creating a branch for that subject area. Branching lets you work on changes in isolation and manage the update without affecting other work or environments. Once the branch exists, you use the Extend a Dimension operation to bring in the attributes from the other data source and attach them to the existing dimension. This step lets you select the exact attributes to add and define how they map to the dimension.

Deleting the data source would remove the connection and available attributes, renaming the dimension changes only its label, and extending a dimension automatically would not pull in the desired attributes from another source without explicitly performing the extension. The two-step approach—create a branch and then extend the dimension—is the correct workflow.