Which Statement Best Describes the Relationship of Advertising, Personal Selling

Which statement best describes the relationship of advertising, personal selling, publicity, and public relations?

A) Public relations includes all advertising, personal selling, and sales promotion activities that are image-related.
B) Advertising, public relations, and publicity are always reported in independent media.
C) Advertising, public relations, and publicity can be either demand- or image-directed.
D) Advertising, public relations, and publicity are always forms of mass communication.