Question

英语单选：What made her struggle to become an artist so hard?的回答__________ she was a woman.

19．—What made her struggle to become an artist so hard?
—__________ she was a woman.
A. / B. When C.That D. What
答案是C 那为什么不选A？C要怎么解释

Answer 1

这是一个对话形式，上面的问句是what提问的，下面的回答就是一个能相当于what做主语的句子，也就是下面的句子应该是这样的：___ she was a woman made her struggle to...，这样的话你再看一下，主句缺一个引导词，所以选C 是正确的，that做主语从句的引导词，引导的部分做（made）的主语

Answer 2

That she was a woman made her struggle to become an artist so hard.
这是完整的回答，She was a woman作主语，又是一个句子，句子是不能直接作主语的，因此前面要加个that， 且that无意义，不作成分

Answer 3

That= the fact that (在这里省略作 名词性，用于指代what)
如果不什么都不加 构成一个完整句子，不能用于回答问题。