Prior to getting underway，the Master or person in charge of a vessel must（）.

A.The Chief Mate and Master of a container ship should have the proposed stowage plan ready for the stevedore upon arrival in port
B.When stowed on deck of a break bulk ship，the bottom of the container must be evenly supported throughout
C.With tiered containers，a 40-foot container may be stowed on top of two 20-foot containers
D.Deck load calculations must take into account the square footage of the entire container bottom

A.not to affect the draught trim
B.not to affect the cargo ventilation
C.not to affect the free surface
D.not to affect the vessel's stability