A passenger wants to change their ticket to a flight with more legroom. What do you need to check？

A passenger wants to change their ticket to a flight with more legroom. What do you need to check？
A.If the passenger has long legs.
B.The availability of seats with more legroom and any associated fare differences.
C.The number of other passengers with the same request.
D.The weight of the passenger's luggage.
正确答案：B
试题解析：在处理机票退票时，对于乘客询问的税费退还问题，不能一概而论地说税费不可退，也不能直接表明自己不处理，更不能承诺立刻以现金形式退还税费。