请问 What if ,what about ,what about 怎么区别?

题目

请问 What if ,what about ,what about 怎么区别?
____ the fact that we didn't pass the examination is true?
Tell you the truth,I didn't think about it.
A What if
B what about
C so what
D what about 可怎么觉得每个选项都可以似的 可以帮分析分析吗?

答案

what if 的意思 是 就算 .又怎样,套入原句,字面意思就是
就算我们考试不及格又怎样呢?
老实的告诉你,我不理它.
what about 的意思是 .怎么样（好吗）,例如：what about having lunch at
that new restaurant?去那家新餐厅吃中午饭好吗?
so what 的意思：那么.是什么?例如：So what are VPNs?那么,vpn为何物?