Which type of aircraft speed defines Category A airplanes in this context?

In the context of aircraft classification, Category A airplanes are defined by their maximum airspeed at the threshold of 1.3 times the stall speed in the landing configuration. This category typically encompasses aircraft with a maximum airspeed of 90 knots or lower. Thus, the correct answer refers to a maximum airspeed of 90 knots, which aligns with the standard definitions used in aviation for categorizing aircraft performance during approaches and landings.

Understanding this classification is essential for pilots and operational planning, as it influences approach speeds, minimum separation requirements, and procedures to ensure safety during takeoff and landing phases. It’s also important to note that knowing the category helps in determining the appropriate decision-making protocols related to speed management in various phases of flight.