Which of the Following Statements About Media Planning Is True

Which of the following statements about media planning is true?

A) One reason media planning is easier today than it was 20 years ago is the increasing number of media choices.
B) The ability to advertise to larger and larger segments has made the job of media planning easier.
C) The cost of all media is less today than it was 10 years ago.
D) The job of media planning has been made more difficult by changes in the way advertising is bought and sold.
E) The job of media planning has been made more difficult by legislation that prohibits repetitive advertising.