How is flight path director guidance displayed on the PFD in the TRK-FPA mode?

In the TRK-FPA (Track-Flight Path Angle) mode, flight path director guidance is indeed displayed by a single guidance bar that combines the commands for both pitch and bank angle. This integration simplifies the pilot's workload by providing a clear, consolidated visual cue on the Primary Flight Display (PFD) that directs the flight path control in a coordinated manner. The single bar represents the required adjustments the pilot must make to maintain the desired track and flight path angle, ensuring that the aircraft follows the intended trajectory effectively.

The other options do not accurately reflect how the TRK-FPA mode operates. For instance, guidance in the form of a conventional cross-bar is characteristic of other operational modes but not TRK-FPA, which specifically uses the combined guidance bar for enhanced clarity. Additionally, the statement about the flight directors not being displayed in TRK-FPA mode is inaccurate, as the system is designed to provide useful guidance in this mode. Furthermore, the claim that TRK-FPA guidance can only be displayed during takeoff and landing is also incorrect; this mode is utilized during various phases of flight, including cruise, as long as the aircraft configuration permits it.