What should you say when a passenger asks about the time it takes to process a ticket refund？

What should you say when a passenger asks about the time it takes to process a ticket refund？
A.I don't know， could be a day， could be a year.
B.It usually takes [X] business days， but it may vary depending on the payment method and the airline's processing speed.
C.You'll get it when you get it.
D.I'm not responsible for that.
正确答案：B
试题解析：当乘客询问处理退票所需的时间时，客服应给出一个相对准确的估计，说明通常需要多少个工作日，并告知可能会因支付方式和航空公司处理速度而有所不同。