The origin of Earth's primitive ozone layer
A)is attributed to photosynthesis.
B)traces back to the Cambrian period.
C)is attributed to volcanic eruptions.
D)helped to form the oceans.

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The Answer of The origin of Earth's primitive ozone layer
A)is attributed to photosynthesis.
B)traces back to the Cambrian period.
C)is attributed to volcanic eruptions.
D)helped to form the oceans.

The Origin of Earth's Primitive Ozone Layer