Final answer:
True, the Gracilis muscle does cross the knee joint, aiding in hip adduction, knee flexion, and medial rotation of the tibia when the knee is flexed.
Step-by-step explanation:
The statement that the Gracilis muscle crosses the knee joint is True. The Gracilis is one of the muscles of the inner thigh or medial compartment. It starts from the pubic bone and inserts into the tibia on the medial side of the knee. The Gracilis is responsible for hip adduction, knee flexion, and medially rotates the tibia on the femur when the knee is flexed. This action is important in movements where crossing the legs is required. Hence, the Gracilis fulfills the criteria of a muscle that crosses the knee joint.
Regarding the multiple-choice question related to muscles and the knee joint, the correct answer would be (c) the Gracilis. This is because the Gracilis is involved in the action described, which is the movement that allows you to cross your legs.