![](https://cos-cdn.shuashuati.com/pipixue-wap/2020-1230-1107-56/ti_inject-812ce.png)
S1:The cargo wire at Hatch No.4 is worn out. S2:I suggest that you change it for safety. Q:What does the second speaker mean? A. It's necessary to stop working hatch No.4. B. It's necessary to change shift at hatch No.4. C. It's unsafe to change for a new cargo wire. D. It's unsafe to continue using the cargo wire.