Assume That the Quantity Consumed of Pizza Is Dependent on Three

Assume that the quantity consumed of pizza is dependent on three factors: the price of a pizza, the income of pizza purchasers, and consumers' taste for pizza. When graphing the relationship between the price of a pizza and the quantity of pizza consumed

A) the price of a pizza and the income of pizza consumers are the only variables that are allowed to change.
B) the price of pizza and quantity consumed of pizza are the only variables that are allowed to change.
C) consumers' taste for pizza and the income of pizza purchasers are the only variables that are allowed to change.
D) None of the above answers are correct.