After Muscle Damage, Muscle Fibers Regenerate New Clusters of Acetylcholine

Multiple Choice

After muscle damage, muscle fibers regenerate new clusters of acetylcholine receptors at their former neuromuscular junction site even in the absence of any motor neuron innervation, and motor neurons return to their former NMJ site even if muscle fibers are prevented from regenerating. What does this suggest about NMJ development and regeneration?

A) Motor neurons are not required for the initial development of the NMJ.
B) Something in the muscle fiber marks the site of the NMJ.
C) Something in the extracellular matrix marks the site of the NMJ.
D) Something in the motor neuron marks the site of the NMJ.