What are the two key observational facts that led to widespread acceptance of the Big Bang model?
A)the cosmic background radiation and the high helium content of the universe
B)the cosmic background radiation and the expansion of the universe
C)the cosmic background radiation and the near-critical density of the universe
D)the predominance of matter over antimatter and the near-critical density of the universe
E)the predominance of matter over antimatter and the large scale structure of galaxies

Question

Quizplus · Accepted Answer

BThe cosmic background radiation provides evidence of the universe's hot, dense origin, while the expansion of the universe, observed through the redshift of galaxies, supports the idea that the universe began from a singular point and has been expanding since.

What Are the Two Key Observational Facts That Led to Widespread