The customer asks about the baggage allowance. The agent answers：

The customer asks about the baggage allowance. The agent answers：
A.You can bring as much baggage as you want.
B.The baggage allowance depends on the class of your ticket. For economy class， it's
usually 20 kilograms.
C.I don't know about the baggage allowance.
D.You have to pay for extra baggage.
正确答案：B
试题解析：该回答准确地说明了行李限额与机票舱位等级相关，并给出了经济舱通常的行李限额示例，为客户提供了明确且有用的信息。