Which of the following could provide an explanation for the rapid increase in oxygen levels ~2.5 billion years ago?
A) Sedimentation rates were constant, photosynthetic rates did not change, and respiration rates decreased.
B) Sedimentation rates increased, photosynthesis rates increased, and respiration rates were low.
C) Sedimentation rates increased, photosynthetic rates increased, and respiration rates increased.
D) Sedimentation rates increased, photosynthetic rates remained constant, and respiration rates were low.
Correct Answer:
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