Answer:
Because they are bigger cities and it can be harder to find people escaping
Explanation:
France expected that their colonies would always be part of France. Britain trained their colonies to be self-governing.
The correct answer is religious persecution and here's why:
The Mongol rule occurred at the same time but was not as important as religious persecution. Muslim rule was common earlier during the 6th century, while intellectual oppression was not a recurring issue.
The First Crusade which was in 1096, was the only successful Crusade.