How should you signal the crane operator to hoist（）.<br>A:With forearm vertical and forefinger pointing up，move hand in small horizontal circles<br>B:With arm extended downwards and forefinger pointing down，move hand in small horizontal circles<br>C:Extend arm with fingers closed and thumb pointing upward<br>D:Place both fists in front of body with the thumbs pointing upward

How should you signal the crane operator to hoist（）.
A:With forearm vertical and forefinger pointing up，move hand in small horizontal circles
B:With arm extended downwards and forefinger pointing down，move hand in small horizontal circles
C:Extend arm with fingers closed and thumb pointing upward
D:Place both fists in front of body with the thumbs pointing upward

出自：海船船员证

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