Why bring the issue to the meeting? It is the sort of thing one

Why bring the issue to the meeting? It is the sort of thing one should talk about （ ）.

 in person

 in public

 in general

 in private

“为什么把这个问题带到会议上来？这个事情应该私下讨论。”私下的 in private; in person 作为个人来讲； in public 当众，公开地；in general 总之，一般来讲。