Question

Which material is found in asteroids?

Group of answer choices
A. Helium
B. Carbon
C. Hydrogen
D. Water

Answer 1

From Internet:

So, yes, asteroids are responsible for water for earth. Comets are 80% water, and asteroids it was though was about 20%. I suppose the discovery is that asteroids are wetter than we thought. No problem, and that explains how we still got a lot of water.