A yellow signal floating in the air from a parachute about 100 meter above the water indic

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A yellow signal,floating in the air from a parachute,about 100 meter above the water,indicates that a submarine ______.

A.will be coming to periscope depth

B.will be coming to the surface

C.is on the bottom in distress

D.is in distress and will try to surface

请帮忙给出正确答案和分析,谢谢!

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