Two Inputs,labor and Capital,are Considered Complements If

Multiple Choice

Two inputs,labor and capital,are considered complements if:

A) a fall in the price of labor leads to a fall in the price of capital.
B) they can replace each other in the production process.
C) a fall in the price of labor leads to an increase in the price of capital.
D) increasing the quantity of labor increases the marginal product of capital.