What is the author's MAIN purpose for including information about two different kinds of movies in the article's introduction [paragraphs 1-3]?

A
to provide an example of the direct relationship between music and mood
B
to contrast the effectiveness of different kinds of music for conveying emotion
C
to argue that it is easier to think of music for scary movies than for happy ones
D
to give background about what made the author become interested in music



Answer :

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