What Best Explains Why Glacial Ice Cores Are Ideal for Examining

What best explains why glacial ice cores are ideal for examining climatic conditions in Earth's past?

A) provide high-resolution data on both temperature and carbon dioxide
B) provide actual atmospheric temperatures going back millions of years
C) are not contaminated by volcanic activity
D) record both warming and cooling periods
E) all of the answers listed here

Correct Answer:

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