Answer: A. a sudden outbreak of cholera.
Step-by-step explanation:
Cholera is a bacterial infection caused by bacterial strain Vibrio cholera. It is transmitted by consumption of contaminated food and water. Typically, use of water contaminated with sewage discharge. The symptoms include vomiting, cramps, diarrhoea, dehydration, sunken eyes and cold skin.
According to the given situation, a public health issue can be a sudden outbreak of cholera. This is because of the fact that if an usable water source by a large human community get contaminated with bacteria Vibrio cholera then it will likely to cause cholera on large scale.