A passenger who is deaf is checking in. How can you effectively communicate？

A passenger who is deaf is checking in. How can you effectively communicate？
A.Speak loudly.
B.Use written notes， sign language if you know it， or a communication app.
C.Gesture wildly.
D.Walk away and find someone else to deal with them.
正确答案：B
试题解析：对于失聪的乘客办理登机手续，使用书面笔记、已知的手语或者通信应用程序，能够有效地与他们进行沟通，传达必要的信息。