Which of the Following Is Not an Example of De

Which of the following is not an example of De Beers Diamonds trying toincrease consumer demand?

A) sending the marketing message that a diamond lasts forever
B) ads that illustrate that a diamond should remain in the family and not be sold
C) informing potential customers about how diamonds lose monetary value over time
D) introducing the idea of the diamond engagement ring
E) the "spirit ring" as a sign of independence