Increasing efficiency led to major problems for farmers as a. there was no more frontier land to be had.

b. they needed more and more farm workers.

c. agricultural surpluses caused prices to fall.

d. there was little time for recreation, even on Sundays.

to act quickly in times of danger to the united states

because you have to act quickly if you want to live/survive.

answer; andrew jackson approved nullification by signing it into law,and john calhoun opposed it saying it was unconstitutional;

to reform the distraught soviet union, the democratization of the communist party was promoted through party secretary mikhail gorbachev's policies of “perestroika” and “glasnost.” perestroika refers to the reconstruction of the political and economic system established by the communist party.