Who is being rude here?

本文內容已被 [ 鈴蘭聽風 ] 在 2021-11-15 17:45:30 編輯過。如有問題,請報告版主或論壇管理刪除.
回答: Someone hands you a cup of water中間小謝2021-11-15 16:38:08

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 

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