Cross-Price Elasticity of Demand Measures

Cross-price elasticity of demand measures:

A) how much the quantity demanded of one good changes in response to a change in the price of a different good.
B) how much the quantity demanded of one good changes in response to a change in its price.
C) the magnitude of the shift in demand for a good in response to a change in its price.
D) how much the quantity demanded of a good changes in response to a change in consumers' incomes.