How Do Advertising Practitioners View Public Relations

How do advertising practitioners view public relations?

A) As a tool of marketing to be used to promote sales of the company's products or services.
B) As a job that can be avoided until the company receives bad publicity.
C) As an umbrella process that the companies should use to manage their continuing relationships with their various publics.
D) As an activity to be used in combination with other types of sales promotion.
E) As a task that can be performed only by a professional public relations expert.