Which of the Following Statements Is/are True

Multiple Choice

Which of the following statements is/are true?

A) When the knee undergoes a significant amount of flexion,it is necessary for the femur to slide forward on the tibia in order to prevent its rolling off of the tibial plateau.
B) During extension,the femur must slide backwards on the tibia.
C) Both when the knee undergoes a significant amount of flexion,it is necessary for the femur to slide forward on the tibia in order to prevent its rolling off of the tibial plateau and during extension,the femur must slide backwards on the tibia.
D) None of these answers is correct.