--i'm afraid they may not agree with you.

--i'm afraid they may not agree with you.
--i don't care whatever they'll say.i've made my decision and i'm going to ( ) it.
a.carry out
b.keep up
c.insist on
d.stick to
1、答案选哪个
2、选项中每个短语是什么意思.
我同意3喽的，其实B也是坚持啊，“维持，继续”也合题意啊，这题出的，- -