When you doubt the existence of risk of collision,（）.<br>A:such risk shall be deemed to exist<br>B:Such risk shall not be deemed to exist<br>C:You should keep your course and speed<br>D:You needn‟t take any action to avoid collision with any vessel

When you doubt the existence of risk of collision,（）.
A:such risk shall be deemed to exist
B:Such risk shall not be deemed to exist
C:You should keep your course and speed
D:You needn‟t take any action to avoid collision with any vessel

出自：海船船员证

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