单选题The total berth time for a vessel can be reduced through a reduction（）.Aof working gangsBof idle timeCin productivity of the working shiftsDof working hours each working day
单选题
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
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