Pizza is a normal good if the demand a. curve for pizza slopes upward. b. for pizza rises when the price of pizza falls. c. for pizza rises when income rises. d. curve for pizza shifts to the right when the price of burritos rises, assuming pizza and burritos are substitutes.

c. for pizza rises when income rises.

Explanation:

A normal good is a good with a positive income elasticity of demand. That is, the demand for such good increases with an increase in income level.

From the scenario in the question, pizza is a normal good if its demand increases with an increase in income.