| According to Coast Guard regulations (46 CFR), a "B" class bulkhead shall be constructed __________ . |
| A) of steel or equivalent metal construction, suitably stiffened and made intact from deck to deck and to shell or other boundaries |
| B) of approved incombustible materials, but need meet no requirements relative to the passage of flame |
| C) that if subjected to a standard fire test, they would be capable of preventing the passage of flame for one half hour |
| D) that if subjected to the standard fire test, they would be capable of preventing the passage of flame and smoke for one hour |
