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Question 1:
Which of the statements about the spectral colors and light sensation in humans is true?
A. Spectral light causes equivalent color sensations in most mammal species.
B. In order to cause a sensation of a certain color the light should be emitted only in this color.
C. There are more possible spectral combinations than color sensations in the human brain.
D. There are more possible color sensations in the human brain than spectral combinations.

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