A) A positive income effect that dominates the substitution effect.
B) A negative income effect that dominates the substitution effect.
C) A horizontal demand curve.
D) A demand curve that is upward sloping.
For Explanation Click Here:
A Giffen good is a type of inferior good for which an increase in price leads to an increase in quantity demanded, due to the dominant positive income effect outweighing the substitution effect.