Day-shapes must be displayed（）.<br>A:between sunset and sunrise<br>B:only between 8 AM and 4 PM<br>C:during daylight hours in any visibility<br>D:during daylight hours in unrestricted visibility only

Day-shapes must be displayed（）.
A:between sunset and sunrise
B:only between 8 AM and 4 PM
C:during daylight hours in any visibility
D:during daylight hours in unrestricted visibility only

出自：海船船员证

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