What is a typical function of the rudder in the CRJ?

The rudder in the CRJ is primarily used to provide lateral stability and control the aircraft's yaw. This means that it helps the aircraft maintain its directional control during flight and assists in turning the aircraft by pivoting about its vertical axis. When a pilot applies input to the rudder, it effectively alters the aircraft's heading and allows for balanced flight, particularly during turns or when the aircraft encounters crosswinds.

Option A is incorrect because pitch control is primarily managed by the elevators, which affect the aircraft's angle of ascent or descent. Option C is not the role of the rudder; managing airspeed is primarily accomplished through thrust management and flap configurations. Option D also does not pertain to the rudder's function, as engine thrust management is more closely related to the throttle controls and not the ailerons or rudder.

Thus, the correct choice highlights the essential role of the rudder in enhancing lateral stability and ensuring effective control over the aircraft's yaw.