Imagine three universes that have the same expansion rate and contain no dark energy: an open universe, a closed universe, and a flat universe. What can you say about the age of the open universe compared to the other two?
A) The open universe will be older than both the flat and closed universes.
B) The open universe will be younger than both the flat and closed universes.
C) All three universes will be the same age.
Correct Answer:
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