The earth's first atmosphere was composed primarily of: Options: A . &nbspCarbon dioxide and water vapor B . &nbspHydrogen and helium C . &nbspOxygen and water vapor D . &nbspArgon and nitrogen

The earth's first atmosphere was composed primarily of:

Question

The earth's first atmosphere was composed primarily of:

Options:

A . Carbon dioxide and water vapor

B . Hydrogen and helium

C . Oxygen and water vapor

D . Argon and nitrogen

Answer: Option B

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