Which statement concerning the carriage of containers is TRUE?（）.

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
Deck load calculations must take into account the square footage of the entire container bottom