An icebreaker displaying a flag hoist which consists of the code letters “WO” (Whiskey Oscar) is indicating that（）.
- Aicebreaker support is finished
- Bicebreaker support is commencing
- Cthe icebreaker is icebound
- Dthe icebreaker is beset
问题
An icebreaker displaying a flag hoist
参考解析：
分类：固体散装危险品与BC规则题库
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