What is the main idea of this selection?
A Laughter is usually an expression of a positive emotional state, such as joy, mirth, happiness, or relief.
B Laugh tracks added to TV sitcoms cause viewers to laugh as if they were part of a live audience.
C Laughter is a common behavior among people in every culture and every region of the world.
D Laughter is the most important trait separating human beings from wild beasts.
What is the main idea of this selection
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The correct answer is C: Laughter is a common behavior among people in every culture and every region of the world.
Explanation: This option captures the overarching theme that laughter is a universal human experience shared across different cultures and societies. It emphasizes the idea that regardless of background, laughter plays a significant role in human interaction. The other options present specific aspects of laughter but do not encompass its universality as effectively as option C.