You vour letters vourself. I would have posted them if you had asked me.A．didn"t need to p

You vour letters vourself. I would have posted them if you had asked me.

A．didn"t need to post

B．don"t have to post

C．needn"t have posted

D．had posted

请帮忙给出正确答案和分析，谢谢！