Final answer:
A diversion requires a change in the Flight Duty Period depending on the duration and circumstances of the diversion.
Step-by-step explanation:
The answer to the question is c) It depends on the duration and circumstances of the diversion.
A diversion is when a flight is redirected to a different airport due to various factors such as bad weather, mechanical issues, or security concerns. Whether a diversion requires a change in the Flight Duty Period (FDP) depends on the specific situation.
If the diversion is short and the crew can complete their scheduled duties within the regulated FDP limits, then there may not be a need for a change. However, if the diversion is lengthy and the crew exceeds their regulated FDP limits, they would have to request an extension or a revised FDP.