When Comparing the Various Communication Channels Available to Marketing Professionals,it

When comparing the various communication channels available to marketing professionals,it becomes apparent that

A) consumers prefer advertising over other channels.
B) no single channel is better than another channel.
C) public relations is the least expensive,but the most successful channel.
D) personal selling is the most expensive and the least successful channel.
E) online marketing is taking the place of advertising and public relations.