Which of the following hypotheses could explain the fact that the night sky is d

Question

Which of the following hypotheses could explain the fact that the night sky is dark?
A. The hypothesis that there are no stars beyond a certain distance.
B. The radiation from remote stars is shifted from the visible to longer wavelengths due to the expansion of the Universe.
C. The finite time of existence of stars/galaxies did not allow their light to reach us yet.
D. All of the choices are correct.
E. Only the hypothesis that there are no stars beyond a certain distance and the radiation from remote stars is shifted from the visible to longer wavelengths due to the expansion of the Universe

Explanation / Answer

A. This would explain the fact, because there would be a finite amount of stars that may not illuminate the entire night sky.

B. This would also explain the fact, because in a similar fashion as above, we wouldn't see any stars after some distance because our eyes would not be able to detect their light.

C. Again, this would explain the fact because we would be seeing the finite amount of stars whose light has had enough time to reach us. Only part of the sky would be illuminated, with the rest being dark.

D. All of these answers are correct.

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