Final answer:
Option B involves calculating the earliest return takeoff time by adding the required rest period, which could be at least 10 hours and 15 minutes, to the flight's actual arrival time.
Step-by-step explanation:
The correct answer is option B which involves calculating the minimum required rest time between flights for pilots (crew rest period) and adding that to the actual flight time to determine the earliest possible return takeoff time.
Airline regulations often require the crew to have a certain minimum rest period between flights, which could be equal to or greater than the duration of the previous flight or a fixed number of hours.
If we assume a minimum rest period equal to the actual flight time for this scenario (which is 10 hours and 15 minutes), the earliest takeoff time can be calculated by adding the rest period to the landing time of the inbound flight.
Since the flight duration was 10 hours and 15 minutes, and assuming the crew requires at least that much rest, the earliest the same crew could legally take off for a return flight would be after an additional 10:15 hours of rest.
If we also account for airport processing times (check-in, security, boarding), which can take approximately two hours before the flight, this must be added to the total turnaround time before the return flight can depart. However, without a specified arrival time, we cannot calculate the exact earliest takeoff time for the return flight.