When Her Income Increases from $10,000 to $20,000,as Shown in the Accompanying

When her income increases from $10,000 to $20,000,as shown in the accompanying table,Marguerite increases the quantity demanded from 3 to 7 rolls at a price of $3.From the midpoint method,income elasticity of demand for sushi is:

A) 0.67.
B) 1.20.
C) 1.33.
D) 0.83.
E) 0.50.