If a Product's Income Elasticity of Demand Is 1

Multiple Choice

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

A) an increase in income will lead to an increase in demand for the product.
B) the product is certainly a necessity.
C) the product is an inferior good.
D) a decrease in income will lead to an increase in demand for the product.
E) an increase in income will lead to an increase in quantity demanded of this product by 1.7%.