Suppose That Average Incomes Increased from $30,000 to $34,000,and the Quantity

Suppose that average incomes increased from $30,000 to $34,000,and the quantity demanded of a product increased from 45 to 55.What is the value of the income elasticity of demand?

A) +0.625.
B) +0.74.
C) -1.0.
D) +1.36.
E) +1.6.