Answer :
Rivers served as a defensive barrier against disease is not a reason for the growth of American cities along rivers in the mid-1800's.
A reason for the growth of American cities along rivers in the mid-1800s does not include option C: Rivers served as a defensive barrier against disease.
What are defense barriers?
The term defense barriers defined as the issues that makes the learning of business environment is more difficult.
During the 1800s, people have to suffered from various losses specially the barriers of different rivers. These type of rivers create a issues against diseases.
Therefore, correct option is C.
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