Some important music companies used laws to guard against______.A.illegal revising of tune

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Some important music companies used laws to guard against______.

A.illegal revising of tunes by a girl over the Internet

B.illegal download of their music over the Internet

C.possible plagiarism over the Internet

D.downloading too many tunes with too less payment

请帮忙给出正确答案和分析,谢谢!

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