Answer:
D
Explanation:
The Mongol army conquered hundreds of cities and villages and killed millions of people. One estimate is that about 11% of the world's population was killed either during or immediately after the Mongol invasions (around 37.75–60 million people in Eurasia).
True. The fact that they were in groups makes them a civilization. However, the criteria for civilization is fluid and I would need more information from the lesson to give a definitive answer.
Constantinople was the capitol city of Byzantine Empire .
Answer: Constantinople.
