Which of the Following Is True of Quadriceps Contusions

Which of the following is true of quadriceps contusions?

A) They occur owing to a herni­ated lumbar disc pressing on the sciatic nerve as it exits the lumbar spine.
B) They are disorders in which the epiphysis of the femur slips from the femoral head in a backward direction.
C) They usually de­velop as the result of a severe impact on the relaxed thigh.
D) They often result from repetitive movements that cause degeneration of the labrum.