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Betelgeuse is a bright red supergiant star located approximately 250 light-years from Earth. Why does Betelgeuse appear red to our eyes?
A. Betelgeuse absorbs red light at its surface while reflecting blue and green light.
B. Red light passes unobstructed through Earth's atmosphere while blue is scattered away.
C. Blue light is absorbed by Betelgeuse's atmosphere so only red light reaches us.
D. Visible light from Betelgeuse is emitted primarily in the red end of the spectrum.