Which of the Following Is Evidence for the Existence of "Dark

Multiple Choice

Which of the following is evidence for the existence of "dark matter" in the universe?

A) The rate of expansion of the universe is speeding up.
B) Stars eventually use up their fuel and stop shining.
C) The outlying stars in a galaxy appear to rotate more rapidly than expected.
D) Either there is no proof that dark matter exists, or there is no way to calculate its abundance.