The correct answer to this open question is the following.
Although there are no options attached, we can say the following.
The problem is for the City of Atlanta, which should have taken the proper measures to prevent the river's contamination and the correct measures to clean it and minimize or eliminate the complaints form citizens. The Chattahoochee River was very important for the growth and development of Atlanta, Georgia. It is a shame that today, the river is polluted, produces a strong stench, fish are dying, water has turned a brownish color, and environmentalists have found E.coli bacteria.