What do you do if a passenger has a discount code during the ticketing process？

What do you do if a passenger has a discount code during the ticketing process？
A.Refuse to apply the code.
B.Enter the discount code correctly in the system and verify the discounted fare.
C.Charge the full fare and pocket the difference.
D.Tell the passenger the code is invalid without checking.
正确答案：B
试题解析：在售票过程中，当乘客提供折扣代码时，客服人员应正确地将折扣代码输入系统并核实优惠后的票价，以确保乘客能享受到应有的优惠。