A rise in the price of Pepsi that causes a household to shift its purchasing pattern toward Coke and away from Pepsi is the effect of a price change. A) income B) substitution

Substitution ---B

Explanation:

When goods are closely related  together such that they both give similar purpose , they are called Substitute goods.

Therefore when any of the substitute goods prices rises, Consumers will go for the  cheaper alternatives which will provide more value for thier money.

Here, the rise in the price of Pepsi caused consumers to shift to a cheaper alternative which is Coke. Other substitute goods that can have the Substitution effect include beef and chicken, butter and margarine etc