An Indifference Curve Slopes Downward Because

Multiple Choice

An indifference curve slopes downward because

A) it shows that people are only happy when they increase consumption of all goods.
B) it shows that when a person gives up some of good X they must increase their consumption of good Y to remain indifferent.
C) it shows that when a person gives up some of good X they can afford to increase their consumption of good Y.
D) it is a demand curve without prices.
E) the quantity demanded increases as the price falls.