If a person has a comparative advantage in some activity, she must have an absolute advantage in that activity as well

In the figure above, for the 3,000th unit, the maximum price a consumer is willing to pay is

A) $5. B) $10. C) $15. D) $0. E) $25.

Which of the following is not an example of De Beers Diamonds trying to increase 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