The Reason for the Vast Amount of Hydrogen in the Interior

Multiple Choice

The reason for the vast amount of hydrogen in the interior of Jupiter is probably that

A) Jupiter formed from mutual gravitational contraction of the primordial hydrogen gas.
B) the mass of the initial condensation of rocks at Jupiter's orbit was sufficient to attract vast amounts of gas to it.
C) nuclear fission of atoms in Jupiter's interior split all nuclei down to hydrogen nuclei early in its history.
D) Jupiter became so hot in its interior that all kinds of atoms and molecules were melted down and dissociated into the fundamental atom-hydrogen.