contestada

Where did earth's oxygen come from? select one:
a. produced by volcano exhausts.
b. produced during the formation of the moon.
c. produced by microscopic life over a billion years.
d. delivered by comets to the early earth?

Respuesta :

SARGEDOG
Hello, the answer to the question that you asked is:
c. produced by microscopic life over a billion years.
Hope this helps please award brainly :)

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