Why Was the Comet or Asteroid Impact 65 Million Years

Multiple Choice

Why was the comet or asteroid impact 65 million years ago an event that benefited the evolution of humans?

A) It deposited a significant amount of nitrogen into Earth's atmosphere.
B) It led to an increase in global UV radiation, which killed off most of the forests and jungles.
C) Conditions became more favorable for mammalian life.
D) Plant life began to decline.
E) It brought human DNA to Earth.