Answer:
A. It causes disease to spread more easily.
Explanation:
The answer is A becuase of overcrowding there would be more diseases since they are "piled" on top of each other. It would also cause a higher demand for jobs and houses.
You need your book to answer the questions
I don’t know if this is right but I am guessing Britain and France
Answer:
Benefit: Having a complete poll of every citizens candidate.
Risk: Some citizens will vote for any candidate or be there will be paid groups of non-opinionated voters.
Explanation: