A Gift-Giver's Efficient Number of Gifts (To Give to a Gift-Recipient)has

question 9

Multiple Choice

A gift-giver's efficient number of gifts (to give to a gift-recipient) has fallen from 10 to 8.  This could be because

• A)the gift-giver's marginal benefit and marginal cost curves for giving gifts remained constant.
• B)the gift-giver's marginal cost curve of giving gifts shifted up and leftward.
• C)the gift-recipient "fell out" of the gift-giver's utility function.
• D)the gift-giver's marginal cost curve of giving gifts shifted down and rightward.

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