I'm rather confused; would you please ______ your proposal to me

I'm rather confused; would you please ______ your proposal to me again?
A、expose
B、expand
C、explain
D、explore
【正确答案】：C
【题目解析】：我搞糊涂了，请你再说明一下你的提议好吗？explain意为解释，说明，讲解。