According to Professor David Robinson of the University of California-Berkeley's

According to Professor David Robinson of the University of California-Berkeley's Haas School of Business, MPR

A) directly and measurably results in sales of goods and services.
B) is a technique used to foster communication between a firm and its constituencies.
C) demonstrates the persuasive power of advertising.
D) is traditionally the basis for all exchange transactions.
E) was first developed by a nineteenth-century, British economist.