What is the configuration of the flight deck in terms of seats?

The correct answer highlights the standard configuration of a flight deck, which typically includes one seat designated for the Pilot-in-Command (PIC), one seat for the First Officer (FO), and an additional observer jumpseat. This setup allows for two fully qualified pilots to operate the aircraft safely and efficiently while providing a space for an additional crew member, such as an instructor or an additional pilot who may not be actively flying but is there for training or observation purposes.

This arrangement ensures optimal communication and cooperation between the PIC and FO, which is crucial for flight safety and effective cockpit resource management. The inclusion of the observer jumpseat maximizes the capacity without compromising the operational aspect of the flight deck.

In contrast, configurations that do not include the observer jumpseat or misallocate the number of seats for the PIC and FO would not align with standard aviation practices and safety protocols. The selected configuration reflects common industry standards for crew seating arrangements in many aircraft.