A Case Where a Consumer Buys Less of a Good

A case where a consumer buys less of a good when its price falls:

A) cannot occur if the indifference curves are convex to the origin.
B) is an example of a Giffen good and will produce an upward-sloping market demand curve.
C) gives rise to a positively sloped price-consumption curve.
D) refers to an inferior good with a substitution effect that dominates the income effect.