单选题Any alteration of course and／or speed to avoid collision shall，if the circumstances of the case admit，（）to another vessel observing visually or by radar.Abe large enough to be readily apparentBbe a succession of small alterationsCbe with due regard to the power and speed of the vesselDleave sufficient room for the other vessel to take action
单选题
Any alteration of course and／or speed to avoid collision shall，if the circumstances of the case admit，（）to another vessel observing visually or by radar.
A
be large enough to be readily apparent
B
be a succession of small alterations
C
be with due regard to the power and speed of the vessel
D
leave sufficient room for the other vessel to take action
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