Answer:
Investment in the Americas reduced disparities in Europe.
Islam spread with the expansion on the Ottoman empire. When they conquer were exposed to this religion and many people converted. They also used trading to spread Islam trough southeast Asia, Africa an many more parts of the world. The first conversions were flexible, s it was easy for people to convert into Islam.
Depends on the time period, but a theme was that money changers stimulated trade and help in the development of growing economies as the trade between different regions occur or happen during that time period.
FERA Federal Emergency Relief Administration
Your answer is going to be c