Multiple Choice
Examine the graph below.There have been ________ to ________ ice ages in the Earth's history,with the latest one occurring in the ________. 
A) four; five; Pleistocene Period
B) five; six; Pleistocene Period
C) four; five; Proterozoic Era
D) five; six; Cenozoic Era
Correct Answer:
Verified
Correct Answer:
Verified
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