Respuesta :
The region of the world that had the most decrease from this time frame was the East.
What caused the East to have a decreased population from 1850 and 1900?
The rise in agriculture was a reason why a lot of people moved from the east to Europe.
This led to a population explosion in Europe in the time. They helped to take care of the agricultural needs of the continent.
Read more on population here: https://brainly.com/question/25896797
I know I am a year late but for the future people the answer is:
B: The east.
A: The west.
3 percent.
Got it right on edge, have a good day :).
