The Relative Proportions of Hydrogen and Helium That the Galileo

The relative proportions of hydrogen and helium that the Galileo Probe found in the atmosphere of Jupiter were almost exactly the same as in the Sun (as was expected) , but the abundances of carbon, nitrogen, and sulfur were proportionally higher than in the Sun. What is believed to be the reason for this?

A) The probe probed an anomalous region where abundances were abnormal compared to the rest of Jupiter.
B) Jupiter formed farther out from the Sun than it is now, where temperatures are colder.
C) Comets and asteroids plunging into Jupiter brought heavier elements with them.
D) The lighter elements collect preferentially in the core, leaving an excess of heavier elements in the atmosphere.