It was the Mongols that invaded Russia
A. the amount of time they spent building the wall
I think the answer is A, when I looked at the picture and did some research, I found that the wall is 70 miles long so it's pretty obvious that they spent a lot of time making it in ancient old times.
Answer:
The Industrial Revolution
Explanation:
The trend toward city life, also known as urbanization, was caused by industrialization. Many families left their farms to work in factories in the cities. This lead to a rapid move towards city life in the 1800's :)
If the patriots had failed their movement they would all be tortured and killed most likely to death by hanging.