Electric field potential, potential drop, or the electrostatic potential
There were many reasons. For starters, it involved getting rid of a large number of Native Americans, and while some supported this, others opposed it as they were peaceful. Another thing was that this meant the introduction of new states and it deepened the division based on whether the states should be slave states or non-slave states. Also they involved war with Mexico and some wanted this and some didn't.
segrogation. "The 1920s was a decade of change, when many Americans owned cars, radios, and .... Yet segregation, or separation of the races, continued to be practiced in North ... Modern civil rights laws for minorities were still many years away."- NC Pedia
I think it's B. A reason to go to a place.
