When the customer asks about the flight duration， the agent answers：

When the customer asks about the flight duration， the agent answers：
A.It's a long flight.
B.The flight from Beijing to Shanghai usually takes about 2 hours and 30 minutes.
C.I'm not sure about the flight duration.
D.You can check the flight schedule online.
正确答案：B
试题解析：给出了具体航班的飞行时长，准确地回答了客户的问题，体现了客服的专业度。