Can someone me with this. economic differences between the northern, southern and western states had the biggest effect on what.

a. increasing sectionalism

b. states elections

c. the era of good feeling

d. the sale of land

The Answer is A Why ? Because the United States divided itself into North, South and later on West. The North rely on fast pace businesses. The South rely on slavery. and the West rely on Gold, Railroads and being open minded of welcoming everyone from the east. And so it continues increasing in the U.S.A of sectional ism today.