It Is Believed That the Two Main Reasons for Mass

Multiple Choice

It is believed that the two main reasons for mass extinctions in Earth's history have been

A) collision between Earth and a large celestial body and human intervention.
B) global warming and human intervention.
C) human intervention and shifting of Earth's continents.
D) global warming and shifting of Earth's continents.
E) collision between Earth and a large celestial body and shifting of Earth's continents.