An Astronomer Discovers That the Abundance of Helium in the First

An astronomer discovers that the abundance of helium in the first galaxies to form in our Universe is only half that of small galaxies near the Milky Way.This would provide evidence:

A) against the Big Bang model.
B) in support of the Big Bang model.
C) in support of the fusion model for main sequence stars.
D) against the fusion model for main sequence stars.