What is a consequence of exceeding the critical angle of attack?

Exceeding the critical angle of attack leads to the aircraft entering a stall condition. The critical angle of attack is the maximum angle at which the wing can maintain smooth airflow over its upper surface. When the angle of attack goes beyond this point, airflow begins to separate from the wing, resulting in a significant loss of lift. This stall condition is characterized by a dramatic decrease in the aircraft's ability to generate lift, which can lead to a loss of control if not promptly managed.

In contrast, the other options describe outcomes that are contrary to what happens during a stall. For example, achieving a higher climb rate would require maintaining a lift-generating configuration, which is impossible once the critical angle is exceeded. Similarly, steady flight and increased lift are also not achievable under stall conditions, as they rely on efficient airflow over the wings to produce the necessary aerodynamic forces.