The total berth time for a vessel can be reduced through a reduction（）.<br>A:of working gangs<br>B:of idle time<br>C:in productivity of the working shifts<br>D:of working hours each working day

The total berth time for a vessel can be reduced through a reduction（）.
A:of working gangs
B:of idle time
C:in productivity of the working shifts
D:of working hours each working day

出自：海船船员证

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