A quick tap is applied to the right patellar tendon of Healthy Person P. This leads to an increase in the length of the right knee extensor muscle. Which of the following occur following this increase in the length of the right knee extensor muscle?

A. An increase in the amount of glutamate released from the central axon terminals of IA muscle-spindle stretch receptor neurons whose peripheral axon terminals are in the right knee extensor muscle.

B. An increase in the amount of potassium conductance in the dendrites of right knee extensor motor neurons.

C. An increase in the amount of calcium conductance in the membranes of the sarcoplasmic reticulum in the muscle fibers of the right knee extensor muscle.

D. A and B.

E. A and C.

F. B and C.

G. A, B, and C.

H. None of the above.