The correct answer here is B. The supplies they have are severely depleted thanks to the vandals that have destroyed not only their homes but also all of the provisions they had in stock. They are trying to feed the remaining population, 7000 of them, by rationing food from the single barn that was not destroyed.
Agriculture changed because a lot of the supplies needed to farm and run the farms have been raised in price there for it is now more costly to run and operate a farm
A slave rebellion in Haiti helped the United States double in size at the beginning of the 19th century. The uprising in what was a French colony at the time had an unexpected repercussion when the leaders of France decided to abandon plans for an empire in the Americas. With France's profound change of plans, the French decided to sell an enormous parcel of land, the Louisiana Purchase, to the United States in 1803.
They believe that governments should meddle into things like economy to improve the lifestyle of others. Socialists usually claim that it is necessary for a government to intervene and deal with businesses and the economy because that ensures that there's equal rights for all people and people are protected from exploitation and monopolies and similar things.