Which Statement Indicates Why Radio Typically Has Its Biggest Audiences

Which statement indicates why radio typically has its biggest audiences between 6 and 9 A.M. and between 4 and 7 P.M.?

A) Many people listen to the radio as they drive to and from work.
B) The funniest shows are on at those times.
C) The lucrative teenage audience listens most during those times.
D) Radio stations want it to be that way.
E) None of the options are correct.