David bought a shirt for $14.50 and a pair of pants for $21.50. David had a coupon for 33% off the pair of pants. Which expression can David use to calculate the total price of his purchase?
A.(14.50 + 21.50)(0.33) . C.14.50 + (21.50)(0.33)
B.(14.50 + 21.50)(0.67) . D.14.50 + (21.50)(0.67)