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A steady decline of absorbance at 620 nm wavelength for coloremetric indicator DCPIP is shown above. In this figure, _______A. longer exposure to light has reduced DCPIP to DCPIPH2. B. longer exposure to light has oxidized DCPIPH2 to DCPIP. C. DCPIPH2 has a higher absorbance at 620 nm than DCPIP does. D. Both A and C are correct. E. Both B and C are correct.
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