You think you’re funny, ______? a. didn’t you b. are you c. don’t you d. do you 答案是的为什么？

好像没有正确答案，应该是 aren't you.
因为陈述部分主句谓语是think, believe, expect, suppose, imagine等引导的宾语从句，疑问部分与宾语从句相对应构成反意疑问句。
I don't think he is bright, is he?
We believe she can do it better, can't she?

C
You think you are funny,don't you ?
这是普通的反意疑问句
若是I think you are funny的话,就应该用aren't you ?
第一人称要和从句保持一致

C

You think you’re funny 主动词是think，肯定，现在时。所以反问要用否定，现在时。

don't you

C···反义疑问···前面you think you are funny是肯定，所以后面疑问要变为否定，don't you.其实前面一句可变为you do think you are funny,这样就好理解了。

c.
你认为你很有趣。那么是肯定句，所以反义疑问句就要否定啦，排除b，d
前后时态一致，就是c啦

此处不是自己的看法，用think的否定式，do not think！