On a vessel making a voyage more than 48 hours long，regulations require that（）.<br>A:a lifeboat drill be held within 12 hours prior to departure<br>B:fire pumps be tested by starting within 12 hours prior to departure<br>C:the emergency generator and lighting system be tested by starting and operating within 12 hours prior to departure<br>D:the entire steering gear be tested within 12 hours prior to departure

On a vessel making a voyage more than 48 hours long，regulations require that（）.
A:a lifeboat drill be held within 12 hours prior to departure
B:fire pumps be tested by starting within 12 hours prior to departure
C:the emergency generator and lighting system be tested by starting and operating within 12 hours prior to departure
D:the entire steering gear be tested within 12 hours prior to departure

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