Comprehensive and Detailed Explanation:

In Talend Studio, REST API metadata can be created using the following methods:

Create it manually in Talend Studio (Option A):

Users can define REST API metadata within Talend Studio by manually specifying API structure,

endpoints, HTTP methods, and parameters.

This method provides full control over the API metadata but requires manual configuration.

Import it from Talend API Designer (Option B):

If an API has been designed using Talend API Designer, it can be imported into Talend Studio.

This enables reusing the API design directly without manual recreation.

Why not other options?

Option C (Import from JSON file): Talend Studio does not support direct import of REST API metadata

from generic JSON files.

Option D (Import from Talend API Tester): Talend API Tester is used for testing APIs but does not

provide an option to import API definitions into Talend Studio.

Reference: Talend Studio User Guide, Talend API Development Documentation