where is the answers and the excerpt?
The correct answer should be the train. Railroads were built and these helped people transfer goods and heavy things like machines all over the country. Railroads were key for everything in the 19th century.
Answer:
A. Plague is now a treatable disease.
Explanation:
The plague with some medication and treatment can be treated within 14 days. Our medical advancements have enabled us to become stronger and fight off thing's that do not belong in our bodies.
Why other choices are wrong: Plague bacteria if consumed by amoeba, can survive and replicate in the soil. Human beings still can be affected by the bacteria that cause plague. And there are rats and fleas always around that carry disease. Not necessarily around, but their droppings can carry such bacteria.
What are the options for this?