The correct answer is Rome, Italy. This is because although the name comes from the 19th century, the road system was used as far as 2 BC, meaning that Rome was a great empire then and there is even a saying that all roads lead to Rome. Of course it's different nowadays, but at that point in time it connected those two cities, Chang'an and Rome.
The Truman Doctrine was an American foreign policy that wanted to counter Soviet Geopolitical expansion during the Cold War
Your answer is D) Sumerians built ziggurats with temples on top to appease many gods.