The best answer in regards to the specific question appears to be A: Many small towns boomed as people came to drill wells.
Answer:
Males who owned property had the right to vote and participate in politics.
Explanation:
One very famous, perhaps the most famous way was through improvised vaccination. Specifically, George Washington ordered his healthy men to be injected with substance taken from the wounds of the sick men during a smallpox infection.
A risk was that those men would get sick just like the the sick men did, but the the potential reward would be that they would get sick in a controlled way and that they would be able to fight this disease.