![](https://cos-cdn.shuashuati.com/pipixue-wap/2020-1230-1107-56/ti_inject-812ce.png)
Do you know which document on board concerns emergency?
A.
The speaker is inquiring about the emergency procedures
B.
The speaker is inquiring about the emergency situations
C.
The speaker is inquiring about the safety documents
D.
The speaker is inquiring about the documents concerning emergency