单选题A vessel sighting a northern right whale dead ahead should（）.Amaintain course and speedBalter course to give a wide clearanceCreport the whale's position to the Canadian Coast GuardDAll of the above
单选题
A vessel sighting a northern right whale dead ahead should（）.
A
maintain course and speed
B
alter course to give a wide clearance
C
report the whale's position to the Canadian Coast Guard
D
All of the above
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