Which of the following actions should be done before throwing this type of inflatable life raft just over the size

A. Inflate it on deck and then launched it clear below
B. Take the top off the container to enable life raft to inflate once in the water if all clear throw raft over side
C. Disconnect the painter and launch it checking that all is clear below
D. Check that the painter is made fast to a secure point and that the sea below is clear