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B
Proterozoic
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C
Paleozoic
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D
Coenozoic
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Solution
The correct option is D Azoic The Azoic Era was the oldest and longest-lasting stage in the development of planet Earth when there was no life, made of many layers of sedimentary rock these sedimentary rocks contain fossilized remains of plants and animals very little oxygen, the ground had a reddish tint, seas were thought to be green for there was a lack of oxygen.