7. Think of Lisa, chocolate pudding, and pumpkin pie. An indifference curve, with regard to these two goods, represents for Lisa

a. the maximum utility she derives consuming these goods.

b. combinations of the two goods that yield the same total utility for her.

c. the quantities of the two goods she will buy if their prices are identical.

d. the quantities of the two goods she will buy at different levels of income.

e. her indifference to both goods if they cannot be purchased individually.