Multiple Choice
Why is the size distribution of temperature fluctuations on the cosmic microwave background useful to astronomers?
A) It shows that the Universe is mostly opaque at the present day.
B) It shows that the cosmological principle is not accurate.
C) It shows how recombination occurred differently in different parts of the Universe.
D) It allows precise measurements of the density of dark energy.
Correct Answer:

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Correct Answer:
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