【单选题】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 γ -motoneurons innervating the intrafusal muscle fibers increase their rate of firing
C.
The Ib afferents from the Golgi tendon organ increase their rate of firing
D.
The Ia afferents from the muscle spindle increase their rate of firing