When dark matter is added, what happens to the speeds of the inner and outer stars?
A.) All the speeds increased the same.
B.) The stars near the center slowed down, but the outer ones were accelerated.
C.) All the stars sped up, but the outer ones gained the most speed.
D.) All were slowed down by the tidal drag of the dark matter.
E.) There was no change.
Ans: C.) All the stars sped up, but the outer ones gained the most speed.
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