Multiple Choice
Which of the following statements is true about Earth's atmosphere?
A) It formed from gases released from rocks in early Earth.
B) Its composition has changed over the history of Earth.
C) It originally had much more oxygen than today, making the early atmosphere toxic to most of the life that exists today.
D) a and b
E) a, b, and c
Correct Answer:
Verified
Correct Answer:
Verified
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