From a Marketer's Perspective, the Primary Roles of Promotion Is

From a marketer's perspective, the primary roles of promotion is to:

A) change the location and shape of the demand curve for a product.
B) affect the demand elasticity for a product.
C) inform, persuade, and remind prospective and current customers about a product.
D) increase a product's sales volume at any given price.
E) increase the attractiveness of a product so that quantity demanded will decline very little if price goes up.