Which of the following best describes the trends in atmospheric co2 concentration and antarctic temperature over the past 800,000 years?

atmospheric co2 concentration has remained about the same, and antarctic temperature has varied widely over the past 800,000 years.

a

both atmospheric co2 concentration and antarctic temperature have remained about the same over the past 800,000 years.

b

atmospheric co2 concentration and antarctic temperature are directly correlated over the past 800,000 years.

c

atmospheric co2 concentration and antarctic temperature are inversely correlated over the past 800,000 years.