Propeller feathering means:

Setting the blades to minimum pitch

Reversing the blade angle

Turning the blades to approximately 90° (edge-on to airflow) to minimize drag after engine failure

Correct

Removing the propeller

Explanation

Feathering aligns the blade chord nearly parallel to the flight path, minimizing windmilling drag from a failed engine.

Test yourself with random questions from Principles of Flight and all other ATPL subjects.