When you are maximizing your utility for product A,

A) marginal utility of A = 0.
B) marginal utility of A = 1.
C) marginal utility of A = price of
D) None of these are true.

When maximizing utility for a product (A in this case), the marginal utility of consuming an additional unit of A should equal the price of A. This is a fundamental principle of consumer choice theory, indicating that consumers allocate their budget to equate the marginal utility per dollar spent across all goods.