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单选题
在IMO采纳的分道通航水域,下列哪些情况下,船舶可免受分道通航制条款的约束?()Ⅰ、紧急情况下为避免紧迫危险 Ⅱ、从事疏浚作业的船舶在作业所必须的限度内 Ⅲ、从事清除水雷作业的船舶在作业所必须的限度内 Ⅳ、采取避让行动时
A
Ⅰ
B
Ⅰ、Ⅱ
C
Ⅰ、Ⅱ、Ⅲ
D
Ⅰ、Ⅱ、Ⅲ、Ⅳ
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