Suppose That the Price of Doughnuts Decreases and That Doughnut-Holes

Multiple Choice

Suppose that the price of doughnuts decreases and that doughnut-holes are a by-product of producing doughnuts. One would expect:

A) the supply of doughnuts to decrease.
B) the quantity supplied of doughnuts to decrease.
C) the supply of doughnut-holes to increase.
D) the quantity supplied of doughnut-holes to increase.