According to the Big Bang theory of the origin of the universe, the universe has expanded from a hot dense state into a vast, cooler state. What would be considered scientific evidence supporting this theory?
Group of answer choices
Galaxies are moving toward each other.
Galaxies are moving away from each other.
Cosmic background X-ray radiation was detected in space.
The existence of common elements throughout the universe.
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Explanation:
Galaxies are moving away from each other
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