Which of the Following Statements About Greenhouse Gases Is Most

Multiple Choice

Which of the following statements about greenhouse gases is most accurate?

A) Greenhouse gases have never been very stable, and have increased dramatically in the past 130 years.
B) Greenhouse gases were fairly stable through most of human history, but have decreased dramatically in the past 130 years.
C) Greenhouse gases have never been very stable, but have decreased dramatically in the past 130 years.
D) Greenhouse gases were fairly stable through most of human history, but have increased dramatically in the past 130 years.
E) Greenhouse gases increased steadily through most of human history, but have remained stable over the past 130 years.