You are loading a cargo that includes cylinders of acetylene aboard your break bulk vessel. Which statement is true? （）

A. The cylinders must be stowed at least 10 horizontal feet from corrosive materials in the same space
B. Stowage in the upper deck-deck is considered to be the equivalent of "on deck" stowage for this cargo
C. The cylinders must have a red label for flammability and a green label for compressed gas
D. The cylinders may be protected from the radiant heat of the Sun by laying a tarp on them