Final answer:
In aviation, Flight Duty Period (FDP) allows for a maximum of two extensions greater than 30 minutes (up to 2 hours). The correct option is b.
Step-by-step explanation:
In aviation, Flight Duty Period (FDP) refers to the time period from when a pilot or crew member reports for duty until they are released from duty. FDP extensions are allowed in certain circumstances to account for unexpected delays or disruptions during a flight. According to regulations, a maximum of two FDP extensions greater than 30 minutes (up to 2 hours) can take place. Hence, b is the correct option.