which one should be chosen?

I first met him___a cold afternoon in January.
A on;B in;C at;D during

which one should be the best answer?and why?
那in为什么不可以呢？

which one to choose Which one? Thank u. which one is better the one 和 which which one 与 which的区别 in which 与 one in which which is_,this one or that one? Which one did you choose? which is the right one? Which one to choose? Thanks.