A yellow signal，floating in the air from a parachute，about 300 feet above the water，indicates that a submarine（）.
- Awill be coming to periscope depth
- Bwill be coming to the surface
- Cis on the bottom in distress
- Dis in distress and will try to surface
问题
A yellow signal，floating in the air fr
参考解析：
分类：海上避碰规则题库
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