Which of the following would help in maintaining stable flight?

The active trim system management is essential for maintaining stable flight because it automatically adjusts the aircraft's control surfaces to manage the aerodynamic forces acting on the aircraft. By optimizing the trim settings, the active trim system reduces the pilot's workload, allowing for smoother flight and better handling characteristics. This stability is particularly crucial during different phases of flight, such as cruising, climbing, or descending, where variations in speed and weight can cause changes in the aircraft's behavior.

Proper trim management helps ensure that the aircraft stays in a neutral position with minimal control input, enhancing both comfort for passengers and safety during operations. This system can help counteract any unintended pitch changes, contributing to a steadier flight path.

Other options may influence flight dynamics but do not provide the specific stabilizing effect that an active trim system does. For example, higher speed settings can increase lift and control responsiveness but may not promote stability, especially in turbulent conditions. Reducing altitude can sometimes improve stability by increasing air density but may not be appropriate for all flight operations. Frequent updates to navigation are crucial for situational awareness and route accuracy but do not directly influence the physical stability of the aircraft in flight.