You Have Just Read an Advertisement for a New Drug

You have just read an advertisement for a new drug that claims people who take it can get muscular bodies without spending months lifting weights in the gym.The drug stimulates muscle growth in the same way that weight lifting does,which is to

A) stimulate growth in the size of existing muscle fibers.
B) stimulate existing muscle fibers to divide.
C) stimulate existing muscle fibers to fuse with one another.
D) turn surrounding connective tissue into muscle tissue.
E) stimulate an increase in the proportion of slow-twitch muscle fibers.