When two vessels are in sight of one another and NOT in or near an area of restricted visibility，any of the following signals may be given EXCEPT（）.<br>A:a light signal of at least five short and rapid flashes<br>B:one prolonged，one short，one prolonged，and one short whistle blasts<br>C:four short whistle blasts<br>D:two short whistle blasts

When two vessels are in sight of one another and NOT in or near an area of restricted visibility，any of the following signals may be given EXCEPT（）.
A:a light signal of at least five short and rapid flashes
B:one prolonged，one short，one prolonged，and one short whistle blasts
C:four short whistle blasts
D:two short whistle blasts

出自：海船船员证

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