There Is Very Little Hydrogen or Helium in the Inner

There is very little hydrogen or helium in the inner part of the solar system today. Astronomers believe the reason for this is that

A) all the light elements went into the formation of the Sun itself and little were left over for the rest of the solar system.
B) the intense radiation from the early Sun drove the light elements out of the inner solar system.
C) heavier elements were attracted in from the outer part of the solar system, displacing the light elements originally in the inner part.
D) the light elements underwent chemical reactions and were locked up in chemicals in the inner solar system.