Correct Option: D

The Unique Selling Proposition (a.k.a. Unique Selling Point, or USP) is a marketing concept that was first proposed as a theory to understand a pattern among successful advertising campaigns of the early 1940s. It states that such campaigns made unique propositions to the customer and that this convinced them to switch brands. The term was invented by Rosser Reeves of Ted Bates & Company. Today the term is used in other fields or just casually to refer to any aspect of an object that differentiates it from similar objects. The term USP has been largely replaced by the concept of a Positioning Statement.