A consumer has preferences over bundles of apples (x) and oranges (y) represented by the utility function U(x, y) = √(xy). What is the interpretation of the utility function?
A) It represents perfect substitutes between apples and oranges
B) It represents perfect complements between apples and oranges
C) It represents diminishing marginal utility for both apples and oranges
D) It represents increasing marginal utility for both apples and oranges