![](https://cos-cdn.shuashuati.com/pipixue-wap/2020-1230-1107-56/ti_inject-812ce.png)
A vessel,which does not normally engage in towing operations,is towing a vessel in distress.She ____.
A.
need not show the lights for a vessel engaged in towing,if it is impractical to do so
B.
may show the lights for a vessel not under command
C.
must show a yellow light above the stern light
D.
must show the lights for a vessel towing