单选题In restricted visibility the speed of a vessel without operational radar may be（）enable effective avoiding action to be taken on sighting another ship.Atoo low toBtoo high toCtoo high forDtoo low for
单选题
In restricted visibility the speed of a vessel without operational radar may be（）enable effective avoiding action to be taken on sighting another ship.
A
too low to
B
too high to
C
too high for
D
too low for
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