A is a soldier that it hired for pay by a foreign state is often referred to as a "mercenary" since they are simply hired to help the state in question carry out military objectives.
Answer:
Chinese immigration was almost completely banned for a period of time.
Explanation:
I believe the answer is: B-it was located at a crossroad for trade between Asia and Europe
This location massively contributed to the vast amount of wealth that the Constantinople made through trading. Commodities from Asia such as spices and silk could be sold at a really high margin to the consumers in European Empires.
I'm not sure exactly what unit you're referring to, but three of the main factors that affect oil prices today would be natural disasters, futures trading, and global demand.
