Which product of the agricultural revolution made it possible for one group of citizens to exploit another group?

a. food surplus

b. domesticated horses

c. animal waste

d. livestock herding

A. Food surplus made it possible for the upper class (the people with food) to take advantage of the lower class (the people without food).

The transcontinental railroad provided a means of fast transportation. it cut a 6 month trip into 6 days, created jobs for many people and encouraged immigration. the homestead act played a huge role in western expansion; it allowed settlers to begin a fresh start, and gave them land in exchange for their residence for up to five years and a small fee.