A Consumer Is Buying the Optimal Amount of Goods When

Multiple Choice

A consumer is buying the optimal amount of goods when

A) the total utility from the purchases on all the goods purchased is the same.
B) the marginal utility from the purchases of all the goods purchased is the same.
C) the marginal utility per last dollar spent on all of the goods purchased is the same.
D) the marginal utility from the purchases of all the goods is equal to 1.