"what enteric bacterial diseases are transmitted in polluted water"

Among the enteric bacterial diseases transmitted in polluted water they include; Typhoid fever, bacillary dysentetry, and cholera. Typhoid fever is an acute illness associated with fever caused by the salmonella enterica serotype Typhi bacteria. Bacillary dysentery is a type of dysentery associated with species of bacteria from the enterobacteriaceae family. Cholera on the other hand is a serious bacterial disease that usually causes severe diarrhea and dehydration. 

C) to ensure each new cell has an exact copy of the dna