How long are you prohibited to consume alcohol prior to serving as a member of a watch?（）<br>A:within two hours<br>B:within three hours<br>C:within four hours<br>D:within five hours

How long are you prohibited to consume alcohol prior to serving as a member of a watch?（）
A:within two hours
B:within three hours
C:within four hours
D:within five hours

出自：海船船员证

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