DUE SOON ILL GIVE BRAINLESS

Water from the river was used to cool the reactors and then dumped back in. That was the main source of radiation, although it also came from accidents in the reactors that forced radioactivity to be flushed out, Napier said.

it's either A or B.

Explanation:

powers  are  denied  to the  national governmentin three distinct ways: some  powers, such as the  power  to levy duties on exports or prohibit the freedom of religion, speech, press, or assembly, are expressly  denied  to the  national government  in the  constitution.

b or c im pretty sure