As a promotion mix element, public relations refers to


A. nonpersonal promotional communication about a firm's goods and services.

B. a set of nonpersonal communication tools designed to stimulate more frequent purchases of a product.

C. advertising focused on promoting the company's image with its customers.

D. communication focused on promoting positive relations between a firm and its stakeholders.

E. the two-way flow of personal communication between the firm and its customers.