Which sentence BEST explains how the solar nebula affected the formation of the Earth's water?
(A) The solar nebula is the leftover gas and dust that formed clouds in the universe
after the sun's formation and eventually deposited its water in Earth's atmosphere.
(B) The solar nebula helped attract several water-rich asteroids to the developing
Earth embryo, and the water from those asteroids made up all of the Earth's water
molecules.
(C) The solar nebula's chemical formula brought an abundance of both hydrogen and
oxygen that eventually found each other and combined to form water.
(D) The solar nebula's dissolved hydrogen originally settled in the Earth's core, but
some of it escaped and joined with oxygen to make 1 percent of Earth's water
molecules