it's too late to go out now and (),it's starting to rain

问题描述:

it's too late to go out now and (),it's starting to rain
A.though
B.besides
C.however
D.instead
应该怎么填啊
讲一下理由,谢谢

A.though 虽然,转折关系
B.besides 另外,递进关系
C.however 然而,轻微转折
D.instead 不做A而作B
这句子前后两个都是不去的原因,不含转折也不会有替代关系,所以选B