![](https://cos-cdn.shuashuati.com/pipixue-web/2020-1231-2005-12/ti_inject-812ce.png)
When the bunkering operation is concluded, and before we bunkering hose from the ship’s manifold, the most important operation is______.
A.
take down the “B” or switch off the red light
B.
close all valves that have been opened during the bunker operation
C.
blow the bunker hose to avoid oil spill when the hose is disconnected
D.
close and secure all sounding pipes