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Which best describes the big bang theory? A. The universe is 4.6 billion years old. B. The universe is shrinking. C. Our universe is not the only universe. D. The universe is expanding.



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A. The Universe is 4.6 billion years old this explains big bang theory the best because the Big Bang Also took place 4.6 billion years ago which proves that Universe is formed beacause of Big Bang.
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A. The Universe is 4.6 billion years old this explains big bang theory the best because the Big Bang

Explanation:. This explains big bang theory the best because the Big Bang Also took place 4.6 billion years ago which proves that Universe is formed because of Big Bang.

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