If a Product's Income Elasticity of Demand Is - 1

Multiple Choice

If a product's income elasticity of demand is - 1.7, then we can conclude that

A) the product is certainly a necessity.
B) a decrease in income will lead to an increase in demand for the product.
C) an increase in income will lead to an increase in demand for the product.
D) the product is a normal good.
E) the product is a luxury good.