Dillon pays x dollars to get a haircut. He gives the stylist a 20% tip. The expression representing his total cost is X+0.2x. Which expression is equivalent and why? OA. 1.2x, because adding 20% to the cost of the haircut is the same as multiplying the cost by 1.2. OB. 1.2x, because adding $20 to the haircut is the same as multiplying the cost by 1.2. OC. 1.02x, because adding 20% to the cost of the haircut is the same as multiplying the cost by 1.02. OD. X(0.2), because the cost of the haircut can be factored out.​