Fred's Income Increases from $800 Per Week to $1,200 Per

Multiple Choice

Fred's income increases from $800 per week to $1,200 per week.As a result,he decides to purchase 40 percent more bubble gum each week.The income elasticity of Fred's demand for bubble gum is

A) 0.40.
B) 40.
C) 1.0.
D) 0.12.
E) 10.