The Price Elasticity of Supply of Laptop Computers Equals 1

The price elasticity of supply of laptop computers equals 1.5 if

A) a rightward shift of the demand curve for laptops causes the quantity supplied to increase by 1.5 percent.
B) a rightward shift of the demand curve for laptops causes a 1.5 percent increase in their price.
C) for every 1 percent that laptop prices increase, computer makers produce another 1.5 percent laptops.
D) for every $1.00 that laptops increase in price, computer makers produce another 150 laptops.