During President Andrew Jackson's administration, tensions between __ increased over the issue of _. At the same time, the country underwent a period of rapid _, an economic boom, and a dramatic __ increase. In addition, technological innovations in transportation, such as the _, helped spur __ and create a national market economy.
A) the North and South, nullification, industrialization, population, railroads, commerce.
B) the United States and Mexico, abolition, urbanization, immigration, steamboats, trade.
C) the East and West, slavery, deindustrialization, industrialization, canals, agriculture.
D) the Union and Confederacy, emancipation, urbanization, emigration, telegraph, transportation.
