An Increase in the Price of One Input

Multiple Choice

An increase in the price of one input:

A) will always rotate the long-run total cost curve upward.
B) may rotate the long-run total cost curve upward or may leave the long-run total cost unchanged.
C) could actually rotate the long-run total cost downward.
D) will have no effect on the long-run total cost curve as long as long as the firm is using positive amounts of both inputs.