How does the universe expanding support the Big Bang Theory?

A. This piece of evidence indicates that once atoms formed, the first light was carried through space evenly


B. This piece of evidence indicates there was a huge explosion during the first stages of the universe,
C. This piece of evidence indicates that the universe formed from hot plasma, forming the simplest and lightest elements first
D. This piece of evidence indicates that the expanding galaxies must have come from a single point.