Between what hours can pilots be rostered for duty?

The correct answer reflects the standard operational practices in aviation regarding duty hours for pilots. In most regulatory frameworks, particularly within commercial aviation, pilots are typically rostered for duty within extended hours to ensure they can complete flights, airport operations, and necessary pre-flight preparations.

The timeframe of 7am to 1am allows for a full working day that can accommodate early morning flights, as well as operations that may extend into late night hours while still adhering to regulations on maximum duty periods and rest requirements. This option effectively provides enough coverage for a variety of flight schedules while ensuring compliance with mandatory rest regulations to maintain safety standards in aviation operations. Thus, it is essential for flight planning and the welfare of the crew and passengers alike.

Other options may not adequately encompass the full operational window needed in aviation, leading to restrictions on flight scheduling and potentially impacting service availability.