Which factor has been a major cause of mass migrations during the modern era?
A. Countries around the world suffering from high rates of poverty
B. Economic agreements establishing strict limits on international
trade
O C. Microfinance institutions gaining greater international political
power
D. Disease outbreaks making many countries completely
uninhabitable

Explanation:

Disease outbreaks making many countries completely

uninhabitable

its b they wanted to be able to expand their trade..

after the roman empire fell, some of its cultural achievements lasted for some time and others were lost. lost achievements include architecture , coins, and literacy. however, several things remained, such as the language. people may not have spoken this language in every city, but it influenced the languages they did speak. they also created the julian , which was commonly used until the eighteenth century.