One Guy's Pizza Advertising Expenditures Are $1,200 and Sales Are

Multiple Choice

One Guy's Pizza advertising expenditures are $1,200 and sales are $30,000. When the advertising expenditure increases to $1,400, pizza sales increase to $32,000. The arc advertising elasticity of demand is approximately:

A) 0.
B) 0.1.
C) 0.4.
D) 2.5.
E) 12.5.