試題詳解

5. For consumers, goods A and B are complementary goods. The cost of a resource used in the production of A decreases. As a result
(A) the equilibrium price of B will rise and the equilibrium price of A will fall.
(B) the equilibrium price of B will fall and the equilibrium price of A will rise.
(C) the equilibrium prices of both A and B will rise.
(D) the equilibrium prices of both A and B will fall.