Based on observations of the cosmic microwave background, the overall composition of the universe is approximately _ .
A) 4% ordinary (baryonic) matter, 23% non- ordinary (nonbaryonic) dark matter, 73% dark energy
B) 15% ordinary (baryonic) matter, 85% non- ordinary (nonbaryonic) dark matter
C) 100% ordinary (baryonic) matter
D) 1% ordinary (baryonic) matter, 99% non- ordinary (nonbaryonic) dark matter
Correct Answer:
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