7. If the marginal utility per price of Good A is $5.00 and the marginal utility per price for Good B is $4.50, what does the utility-maximizing rule tell you to do if the budget allows it?

a.) Continue to purchase Good A until the budget runs out.

b.) Purchase one more unit of Good B, and compare again.

c.) Continue to purchase Good B until the budget runs out.

d.) Purchase one more unit of Good A, and compare again.