The mere fact ______ most people

The mere fact ______ most people believe nuclear war would be madness does not mean that it will not occur.
A、what
B、which
C、that
D、why
【正确答案】：C
【题目解析】：本题考查同位语从句。可以跟同位语从句的名词通常有news,idea,fact,promise,question,doubt,thought,hope,message,suggestion,words（消息）,possibility等，同义语从句常用that引导。故本题选C。答案为C。