There isn’t exactly a name for it other than “folded sarcolemma”, however, the end of the motor neuron does extend some projections into these spaces.
I would say C because A is a positive, B is a positive, and D is a positive, The only "disadvantage" is in C
I think it’s B , not entirely very sure
Answer:
it has many years on it
Explanation:
it is old so it is not new