What channel is general communication used?（）<br>A:any appropriate channel except public communication<br>B:any appropriate channel except for public communications<br>C:any appropriate channel besides public communication<br>D:any appropriate channel beside public communication

What channel is general communication used?（）
A:any appropriate channel except public communication
B:any appropriate channel except for public communications
C:any appropriate channel besides public communication
D:any appropriate channel beside public communication

出自：海船船员证

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