As Long as a Consumer Is on a Given Indifference

Multiple Choice

As long as a consumer is on a given indifference curve,what can we say about her preferences

A) She is indifferent to all points that lie on any other indifference curves.
B) Her preferences will not affect the marginal rate of substitution.
C) She is unable to decide which bundle of goods to choose.
D) She is indifferent among the points on that curve.