What are the two key observational facts that led to widespread acceptance of the Big Bang model?
A) the cosmic background radiation and the 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 the universe

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The Answer of What are the two key observational facts that led to widespread acceptance of the Big Bang model?
A) the cosmic background radiation and the 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 the universe

What Are the Two Key Observational Facts That Led to Widespread