How Does Advertising Differ from Public Relations

How does advertising differ from public relations?

A) Advertising reaches its audience through media the advertiser pays for, while public relations does not.
B) Advertising is nonpersonal, while public relations is not.
C) Advertising is usually ethical, while public relations is often not.
D) Advertising is a recognized business function, while public relations is not.
E) Advertising uses the media to create awareness, while public relations does not.