Which of these to further the westward expansion in the united states after 1865?

Options arent listed so Im going to take a guess at what they are, Im guessing that the influx of immigrants to the US helped. Because with these. new Migrants there was cheap labor about. and this helped boost the economy and help the US expand outward

This question is an opinionated one, and we don’t know anything about the module or anything, thus we can not answer it. but if you are having trouble on what it is asking basically it is just asking to (using your knowledge on the topic) say which topics you were most interested and which were the most challenging.hope this : p

My opinion is that it doesn't