From what did the Earth's atmosphere during the Hadean originate?
A) outgassing of volatiles compounds originally incorporated in mantle minerals
B) meteorites that collided with the Earth
C) evaporation of the Earth's early oceans
D) waste products of the Earth's first life forms

Question

Quizplus · Accepted Answer

The Hadean period of Earth's history was a time of intense heat and volcanism, and as a result, the Earth's atmosphere was primarily formed through outgassing of volatile compounds such as water vapor, carbon dioxide, nitrogen, and methane from the Earth's mantle. This process continued to shape the Earth's atmosphere throughout its early history. While meteor impacts may have contributed some volatile compounds, they were not the primary source, and there was not yet any life on Earth to produce waste products.

From What Did the Earth's Atmosphere During the Hadean Originate