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ankahukuk ankahukuk
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6 years ago
In the 1830s and 1840s, cholera epidemics in the United States
 
  A. None of these answers is correct.
 
  B. were diminished, as physicians gained a basic understanding of bacteria.
 
  C. typically killed more than half of those who contracted the disease.
 
  D. were transmitted to humans by fleas living on rats.
 
  E. led many cities to build water treatment facilities.
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