Black holes themselves can not be seen, nor do they leave trails (since emptiness does not have to be caused by a black hole), but there is evidence for black holes: scientists can see the effects of their gravity on nearby stars. The answer is B.
<span>Henry Fairlie on What Europeans Thought of Our Revolution.
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Answer:
They passed the War Powers Resolution Act.
Explanation:
Pollution is one problem because of the factories and such
Answer:
DNR (Department of Natural Resources).
Explanation:
