Tom will maximize his total utility if he buys the quantities of pasta and milk at which ______.
A. The marginal utility from pasta equals the marginal utility from milk
B. He spends all of his budget and marginal utility from each good is equal
C. The marginal utility from the more expensive good is less than the marginal utility from the cheaper good
D. He spends all his budget and the marginal utility per dollar for pasta and milk are equal