The Cuyahoga river is notable because
A. it is polluted with selenium which led to the death of millions of birds.
B. it caught fire.
C. it is a living machine cleaning pollution from the local area.
D. it is routinely flooded with untreated sewage from the city of Cleveland.
E. it is an Endangered Species Act success story.
Answer: B
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Fill in the blank with correct word.
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