The best answer is B. The river flooded yearly which allowed the fertile sediment on the bottom of the river to flow onto the farmland, keeping it fertile.
After the Civil Rights Era, many black people were able to thrive and make significant social, economic and material gains. Many African-Americans moved to cities in order to find better work opportunities. Others decided to pursue higher education, as institutions were more accepting of their enrolment. Many African-Americans joined the middle class and were able to buy houses in desirable areas.
There are many reasons why gains were not the same across the board. While many African-Americans took advantage of these opportunities, others were stuck in a cycle of poverty and oppression that originated during slavery. Others lived in communities where these opportunities were not available, or faced high levels of discrimination and racism.
The black community, as many other communities, has a class stratification. This means that many within the community belong to high classes, many others are middle class, and many are from the lower classes, regardless of the fact that they share the same skin colour. Because of this, sometimes tensions can arise within the community. Many people from the lower classes might resent higher ones, while people from the higher classes can sometimes fail to see the constraints that the lower classes have.
While D is also correct, A is most correct. The US government cannot offer public services and other tax fueled services if everyone chooses not to pay.
The process by which a legislator votes in favor of the legislation of other lawmakers in order to gain support for her own legislation is known as logrolling.
