Which display indicates a vessel conducting mineclearance operations（）.<br>A:Three balls in a vertical line<br>B:Two balls in a vertical line<br>C:One ball near the foremast and one ball at each yardarm<br>D:One diamond near the foremast and one ball at each yardarm

Which display indicates a vessel conducting mineclearance operations（）.
A:Three balls in a vertical line
B:Two balls in a vertical line
C:One ball near the foremast and one ball at each yardarm
D:One diamond near the foremast and one ball at each yardarm

出自：海船船员证

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