Who is being rude here?

來源: 於 2021-11-15 17:34:30 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

A offers her opinions to B. 
B comments A's opinions in an honest and polite way.
C criticizes B “偏狹而且無禮” blah blah ……

Question: Who is being rude here?
Correct answer: C