Ray is buying some ginger roots to brew some fresh ginger ale. the price of the ginger roots is g, and ray has a coupon for 10% off

the expression 0.9g represents the price ray pays for the ginger roots after using the coupon. what does 0.90, point, 9 represent in this context?

a the amount of the discount from the coupon

b the percent, as a decimal, of the discount from the coupon

c the percent, as a decimal, of the original price that ray pays

d the amount ray pays after using the coupon