When you are transferring fuel oil to the setting tanks, precautions to be observed should include ()
A、plugging gooseneck tank vents to prevent accident overflow
B、maintaining a high transfer rate until a slight trickle of oil is observed flowing from the overflow line
C、sounding the tanks frequently and reducing the transfer rate as the level approaches maximum fill
D、maintaining a supply of chemical dispersant to cleanup minor oil spills adjacent to the ship