Wendy's Fast Food Restaurant Wants to Increase Radio Advertising in the Metropolitan

Wendy's fast food restaurant wants to increase radio advertising in the metropolitan area of several major cities. Wendy's wants to advertise close to lunch and dinner times because it feels that consumers are already in their cars and will more likely drive into a Wendy's if they hear an ad around the time they are hungry. Wendy's is seeking to reach as wide of an audience as possible and intends to advertise on several stations within each area to do so. Considering the disadvantages of advertising on the radio, which one is most relevant in this situation?

A) listener inattentiveness
B) lack of visuals
C) clutter
D) scheduling and buying difficulties
E) lack of control