Answer:
B = The center of for learning
Explanation:
<span>Al─Khwarizmi wrote an algebra textbook that was the standard for centuries during the golden age of islam :)</span>
After ten centuries of wars, defeats, and victories, the Byzantine Empire came to an end when Constantinople fell to the Ottoman Turks in May 1453. The city's fall sent shock waves throughout Christendom. It is widely quoted as the event that marked the end of the European Middle Ages.
A bank of the U.S., or the National Bank.
