Use the Following Figure to Answer the Question

Use the following figure to answer the question.

The figure shows the absorption spectrum for chlorophyll a and the action spectrum for photosynthesis. Why are they different?

A) Green and yellow wavelengths inhibit the absorption of red and blue wavelengths.
B) Oxygen given off during photosynthesis interferes with the absorption of light.
C) Other pigments absorb light in addition to chlorophyll a.
D) Aerobic bacteria take up oxygen, which changes the measurement of the rate of photosynthesis.

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