Answer:
A.) Massachusetts freed all remaining slaves during the Revolution
Explanation:
During the American Revolution, some northern states were already preparing to create an alley that would prohibit slavery in their territories, thus making all slaves free. Immediately after the Revolution, the state of Massachusetts was the first to adopt this law because it wanted to promote equality between individuals, use black labor in industry and because many blacks fought in the war during the Revolution, among these blacks was Caesar Robbins.
One problem was that some states didn't fully understand the meaning for it
I will assume you mean the Homestead Act of 1862, which was the first and most iconic one. In that case, the requirements were that the homesteader, the one filing the claim, be either the head of the household OR twenty-one years old, they had to live only on the designated land, build a home, improve it, and farm the land for five years, and, finally, they had to be a United States citizen that had never taken up arms against America.
Richard Nixon, the 37th President of the United States, has always been better known for his Watergate Scandal, which led to his resignation from office in 1973. However, this President was also known for the focus he gave to the enviromental topic, which was avid since the 1950´s and became even more important in the U.S public eye after the famous oil spill in Santa Barbara, California, in 1969. Although many criticize Nixon because they say he wasn´t really interested in the environmental movement at all, the truth is that at least for political reasons, Nixon passed several bills that reinforced the preeminence and importance of the environment for the federal government. Aside from the Environmental Policy Act, and the Endangered Species Act, one of the biggest pieces of law he signed was the creation of the Environmental Protection Agency, because it gave the environmentalist movement the power and the influence to control matters of environment from the high seat of the federal government. From being just a civilian movement, the formation of the EPA showed the precedence of nature in American politics and it became the central topic for election and re-election of members of one or the other party. This is why the correct answer is B.