According to Analysis of Air in Greenland and Antarctic Ice

Multiple Choice

According to analysis of air in Greenland and Antarctic ice cores, global temperature has ____.

A) increased steadily over the past 400,000 years
B) decreased steadily over the past 400,000 years
C) increased and decreased in cycles over the past 400,000 years
D) remained stable over the past 400,000 years
E) remained stable and then increased during the past 100,000 years