When a passenger checks in baggage， what information do you first need to ask for？

When a passenger checks in baggage， what information do you first need to ask for？
A.The passenger's age.
B.The destination of the flight.
C.The passenger's contact number.
D.The weight and size of the baggage.
正确答案：D
试题解析：办理行李托运时，首先需要了解行李的重量和尺寸，以确定是否符合航空公司的规定，进而进行后续操作。