The correct two answers are:
✅ C. Use Debug to test the flow in Flow Builder.

The Debug feature in Flow Builder lets you run the flow in a test mode, see the path taken, and check for errors without leaving the builder.
You can also provide test input values and view detailed logs.

✅ D. Test the flow in a sandbox.

Best practice is to test in a sandbox environment before deploying to production.
This ensures you don’t accidentally create real records or impact live data during testing.


❌ Why not A?

There is no concept of “setting up a flow interview” manually for testing; interviews are created when the flow runs.

❌ Why not B?

Running the flow in production to create real contacts is not recommended for initial testing.