WILL MARK BRAINLIEST! : )

Why do scientists study deuterium to determine the origins of water on Earth?


A. Deuterium reacts with oxygen to form water just like hydrogen does.

B. Deuterium only comes from outside the planet.

C. Deuterium has a neutron in its nucleus, whereas hydrogen does not.

D. Deuterium is easier to study than ordinary hydrogen.


Please explain your answer! : )
Thanks!