試題詳解

20. You can spend $10 for lunch and you would like to purchase two cheeseburgers. When you get to the restaurant, you find out the price for cheeseburger has increased from $5 to $6, so you decide to purchase just one cheeseburger. This is best described as the:
(A) substitution effect of a price change.
(B) income effect of a price change.
(C) a decrease in the buyer's reservation price.
(D) an increase in the buyer's reservation price.