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What periods were part of the Paleozoic era?

A. Mesozoic
B. Pennsylvanian
C. Cretaceous
and D. Precambrian

Googling the answer wont help. Trust me. I've tried it

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juliedustann

The answer is Pennsylvanian. I worked on this before. The Pennsylvanian era is a subperiod of the Carboniferous Period. i really hope this helps :)

Answer:why does the question say periodS -plural?

Explanation:

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