Indentured servants is the correct answer.
These are usually people who wanted to go to the new world, but are too poor to finance themselves for the trip, and so they agree with a person on the amount of time they would work for their 'master' in exchange for a "free passage"
hope this helps
The answer is B.
The Great Migration was the movement of six million African Americans from the Southern U.S. to the North. As you probably know, back in the 1900's, segregation of African Americans was on the rise. At the time, the North was not involved in this segregation, so African Americans migrated to the Northern states to escape discrimination.
<span> René Descartes</span> was the leader of the Scientific Revolution in France, which developed the mathematical system of Cartesian coordinates.
This plan is known as the Open Door Policy.
This idea was introduced by Secretary of State John Hays in 1899. The goal of this plan was to ensure that all nations had the ability to trade with China. Even though this plan referred to the ability of all nations to trade with China, the real reason behind its development was the fear of the US government being blocked out of trading with China by European countries.