A consumer currently spends a given budget on two goods, X and Y, in such quantities that the marginal utility of X is 10 and the marginal utility of Y is 21. The unit price of X is $2 and the unit price of Y is $7. The utility-maximizing rule suggests that this consumer should?

• decrease consumption of product X and increase consumption of product Y.
• decrease consumption of product X and decrease consumption of product Y.
• decrease consumption of product Y and increase consumption of product X.
• stick with the current consumption mix because it yields maximum utility.