Refer to the Above Graph

Multiple Choice

Refer to the above graph.What will shift D₁ to D₂?

A) An increase in the price of a complementary input
B) A decrease in the demand for the product produced by the labor
C) An increase in the price of a substitute input (if the output effect is greater than the substitution effect)
D) An increase in the price of a substitute input (if the substitution effect is greater than the output effect)