Based on current evidence, how does the actual average density of matter in the universe compare to the critical density?
A) The actual density, even with dark matter included, is less than about a third of the critical density.
B) If we include dark matter, the actual density equals the critical density.
C) The actual density of dark matter and luminous matter combined is no more than about 1% of the critical density.
D) The actual density of matter is many times higher than the critical density.
A
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