Which of the Following Statements Is TRUE Regarding Atmospheric CO₂

question 80

Multiple Choice

Which of the following statements is TRUE regarding atmospheric CO₂ levels during the last 400,000 years?

• A)Atmospheric CO₂ levels have remained relatively constant, and have only increased since the 1800s.
• B)Atmospheric CO₂ levels fluctuate periodically, with the highest levels occurring during interglacial periods.
• C)Atmospheric CO₂ levels fluctuate periodically, with the highest levels occurring during glacial periods.
• D)Correlation exists between low levels of atmospheric CO₂ and high temperatures.
• E)Causation exists between low levels of atmospheric CO₂ and high temperatures.

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