Assume you are a climatologist analyzing seafloor sediment. You have a 200,000 year old cross section of sediment in which you are going to analyze the ratio of oxygen-18 to oxygen-16. During your analysis, you determine that there is a greater quantity of oxygen-18 than oxygen-16 (beyond today's present values) . What does this tell you?
A) The past climate was the same as today.
B) The past climate was warmer than today.
C) The past climate was cooler than today.
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