If the price of B falls to $1, while the price of A and the consumer's income stay the same, what would be the utility-maximizing combination of goods A and B?The substitution effect____________
A. Is generally so weak that its effect cannot be predicted
B. For an increase in the relative price of a good is sometimes positive, but sometimes negative
C. Measures the change in the quantity demanded of a good from a change in its relative price
D. Measures the change in the quantity of a good demanded brought about by a change in real income associated with a change in the price of the good