Answer:
B
Explanation:
Control a heavily desired or needed supply/luxury that is only known to exist in 1 part of the world, and you have a monopoly on it, and you can control the price to your liking, and other countries can't do anything about it, so if they want it, they'll have to pay the price you set.
<span>The Byzantine Empire made its most important contribution to us by preserving much of the Greco-Roman heritage. Given the fact that the Emperors of Byzantine saw and maintained a great deal of their origins from the later Roman Empire, they managed to preserve major institutions such as the Senate, rules of law, etc.</span>
