问题：
[单选题]A beam of white light is separated into beams of various colors, we conclude that white light is actually a mixture of light of these different colors.()
Afrom which
Bto which
Cat which
Din which
[单选题]A beam of white light is separated into beams of various colors, we conclude that white light is actually a mixture of light of these different colors.()
Afrom which
Bto which
Cat which
Din which
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