这道英语选择题应该选什么,麻烦详细分析下!

题目

这道英语选择题应该选什么,麻烦详细分析下!
_______ you decide to take up,you should try to make it succeed.
A.If B.Whenever C.Unless D.Whatever

答案

D吧
whatever=no matter what
选D 的话就是
No matter what you decide to take up, you should try to make it succeed.
take up 应该是及物的吧,这样分析就只能是D了.