Which of the Following Could Provide an Explanation for the Rapid

question 12

Multiple Choice

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.

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