A European living in a country conquered by the Mongols would likely have a perspective that combines a mix of fear, awe, and pragmatic understanding. However, focusing on the options provided, the response they are most likely to have would be:
The Mongols were responsible for developing trade between Asia, Europe, and the Middle East.
This perspective acknowledges the Mongol Empire's role in facilitating trade across vast regions through the Pax Mongolica, which connected different parts of the world and allowed for the exchange of goods, ideas, and culture despite the violent conquests they engaged in. While the other responses reflect negative aspects or broader influences of the Mongols, this option highlights a significant and positive consequence of their rule from a historical trade and cultural exchange viewpoint.