She was so angry that and spole so fast that
none of us understood () she said meant.
A that
B what
C that that
D what what
答案是C， 请解释

你仔细看题目，
She was so angry that 还有spole so fast that
都有that,我想第一个that指“那件事”，第二个是搭配
none of us understood that that she said meant.
第一个that是“和上面一样的那件事',第二个that是作宾语从句的代词，解释后面的she said meant.
句子译为“她是如此生气那件事，并且说的那么快，以至于我们都不明白那件事（哪件事呢？），她说的什么意思。"就是这样，希望对你有所帮助。