An economist who studies global trade markets and exchange rates is known as a(n) economist.

A.

public finance

B.

international

C.

monetary

D.

micro

International economists

Explanation:

International economists are professionals who study the global financial markets, the various currencies and exchange rates and the impacts of different trade policies that can be made such as tariffs.  

The field is broadly divided into the study of international trade, which describes and predicts certain patterns of production and international finance that looks at the impact of cash flow between nations.

i think its either b or c

explanation:

it affected it because the kingdoms (with trade) slowly got richer and richer.