A vessel，which is unable to maneuver due to some exceptional circumstance，shall exhibit （）.<br>A:during the day，three balls in a vertical line<br>B:during the day，three shapes，the highest and lowest being balls and the middle being a diamond<br>C:when making way at night，two all-round red lights，sidelights，and a sternlight<br>D:when making way at night，masthead lights，sidelights，and a sternlight

A vessel，which is unable to maneuver due to some exceptional circumstance，shall exhibit （）.
A:during the day，three balls in a vertical line
B:during the day，three shapes，the highest and lowest being balls and the middle being a diamond
C:when making way at night，two all-round red lights，sidelights，and a sternlight
D:when making way at night，masthead lights，sidelights，and a sternlight

出自：海船船员证

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