the cold war is the right answer.
In urban areas, there are more people, therefore not a lot of farmland. (that eliminates C) If city buildings don't allow flood waters to recede, that could be dangerous in many ways. (So A is still a reasonable answer) If most cities are built in flood zones, there should be some form of shelter if houses aren't safe. Pollutants and diseases being carried in water are already dangerous, but easier to spread with rapid flood waters that are sweeping everywhere. So your best answer would be either A or B.
B. through the Treaty of Paris, at the end of the Seven Years’ War
Answer:
A. Multicultural
Explanation:
Montreal is a melting pot of people from all sorts of cultures
