Practicing Spiking a Volleyball Directly to the Inside of the Side-Line

Practicing spiking a volleyball directly to the inside of the side-line makes you more likely to get a good hit in a game because

A) the neuronal groups that function when you hit just inside have been strengthened by use.
B) the neuronal groups that function when you hit the ball badly have been pruned by non-use.
C) Both A and B
D) Neither A nor B