Answer: u didnt put the question here arent u wasting pts.?
Yes that is true. The MPLA was able to gain control blah blah blah. Oi. I hate H&G.
The transcontinental railroad let the settlers go to the western side of America. With that they needed more farms for food and resources to provide a profit. The settlers did not want to do the work to they forced slaves to work for them. The settlers in the west made slavery increase due to the wanted of profit and the needing to survive.
I think your answer is
B. 179O's