Which of the following provides the strongest evidence to support the claim that there is a black hole at the center of our galaxy?
A) We observe many sources of x-rays near the center of our galaxy.
B) Infrared and radio observations show a large concentration of gas near the center of our galaxy.
C) The motions of the gas and stars indicate that the galactic center has a mass millions of times that of the Sun within a region less than 1 light-year across.
D) We observe a large, dark object that absorbs all light at the center of our galaxy.
C) The motions of the gas and stars indicate that the galactic center has a mass millions of times that of the Sun within a region less than 1 light-year across.
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Indicate whether the statement is true or false