阅读理解。阅读下列短文, 从给的四个选项 (A、B、C和D) 中, 选出最佳选项。
Contrary to popular belief，looking at someone's face alone is not enough to tell us whether they are roaring in celebration or screaming in frustration，researchers claimed. While people may believe they have the ability to read each other's faces，body language is the real clue that shows whether strong emotions someone is feeling are positive or negative.
