Suppose a person's preferences are such that apples and oranges are perfect compliments. This means that (check all answers that apply)
Select one or more:
a.individuals will consume either apples or oranges, but not both, regardless of price.
b.the marginal utility for apples and oranges is constant.
c.the indifferent curves are straight lines and downward sloping.
d.the indifferent curves are shaped like right (90-degree) angles
e. as the price of apples decreases, the quantity of oranges consumed increases.