Which of the following is NOT true of the hamstring group of muscles?
A)It consists of the biceps femoris, semitendinosus, and semimembranosus. B)All of the hamstrings insert on both the tibia and the fibula. C)All of the hamstrings cause flexion of the leg at the knee. D)All of the hamstrings have origins on the ischial tuberosity, although the biceps femoris has an additional origin. E)All of these are true of the hamstrings.