Which of the following statements is true about the knee joint?

• A. The knee joint is a hinge joint where the femur articulates with the tibia and patella.
• B. The knee joint is primarily involved in rotating the legs.
• C. The knee joint is formed by the articulation of the femur with the tibia and fibula.
• D. The joint between the fibula and the tibia is a pivot joint similar to the radioulnar joint in the forearm.