How did railroads helped build economy?

It made travel more affordable, made the Western U.S. more important, made commerce possible on a vast scale, changed where Americans lived, altered Americans’ concept of reality, and also pioneered government-financed capitalism. In addition to transporting western food crops and raw materials to East Coast markets and manufactured goods from East Coast cities to the West Coast, the railroad also facilitated international trade and spread new ideas.

Explanation:

(e) a major consequence of the election was that several southern states

the fact that could also be added to column b is that during world war ii, specifically between the years 1941 and 1945, japan expanded its territory towards the indonesian territory in what was known later as part of the "pacific war". in that time, japan could conquer the philipines, singapore,   borneo, central java, malang, cebu, sumatra and various other islands of the area, therefore expanding its territory for a brief period of time.