Your vessel is equipped with totally enclosed lifeboats. Which statement is true when the boat is enveloped in flames?（）.
- AThe ventilators will automatically close by the action of fusible links
- BThe motor takes its air supply from outside the lifeboat to prevent asphyxiation of the crew
- C A water spray system to cool the outside of the boat is operated by a high-volume manual pump
- DAn air tank will provide about ten minutes of air for the survivors and the engine