Tapping the patella tendon elicits a reflex contraction of the quadriceps muscle. Which of the following occurs during the contraction of the quadriceps muscle?

A、The α-motoneurons innervating the extrafusal muscle fibers decrease their rate of firing;
B、The α-motoneurons to the antagonistic muscles increase their rate of firing;
C、The Ia afferents from the muscle spindle increase their rate of firing;
D、The Ib afferents from the Golgi tendon organ increase their rate of firing