You have found data that indicates that the income elasticity of demand for generic (unbranded) shampoo is -0.7. You should conclude that generic shampoo:

You have found data that indicates that the income elasticity of demand for generic (unbranded) shampoo is -0.7. You should conclude that generic shampoo:
A.is a normal good.
B.is below its equilibrium price.
C.is an inferior good.
D.has inelastic demand.
正确答案：is an inferior good.