QUESTION 19 Brad orders a pizza. He uses a 20% off coupon and then pays $3 for a delivery tip. Which composition function below gives the total amount paid if x is the cost of the pizza, c (x) is the coupon function, and d (x) is the delivery function? OA (doc) (x), c(x) = 0.8x OB (cod)(x), d(x) = 0.8x O c. (d . c) (x ), c(x ) = 0.2x OD. (cod) (x), d(x) = 0.2x QUESTION 20