Why Would an Advertiser Use a Mixed-Media Approach

Why would an advertiser use a mixed-media approach?

A) It is less expensive than a homogeneous media mix.
B) It gives more exposure than a heterogeneous media plan.
C) It is easier to schedule than any other type of media mix.
D) The total effect is greater than the sum of individual parts.
E) The segmentation variables require focusing on targeted groups.