B. and D.
I believe, but I am not 100% sure!
Answer:
Explanation:
Mostly because "Masters" needed more work done doing other stuff instead of working in fields.
Answer:
I believe it's the Treaty of Echota
The French Revolution was a necessary event which lead to positive impacts is correct
As It overthrowed the king(as that king didn’t cared about the common people or the people belonging to the third estate in the France) the king was Louis XVI
Also it helped to overthrow he the estates system in the France.
It also helped to free slaves
Hope I helps you!