B is what I think is the correct answer.
<span>The United States guaranteed favored treatment to British imported goods. As a result, the treaty canceled the American-French alliance. </span>
<span>The Appalachian Mountains served as the line beyond which settlement was forbidden. West of the line was to be considered an Indian reserve. The proclamation proved largely ineffective and only angered settlers and political investors in the land.</span>
Answer:
C. The damage to all living things caused by insecticides
Explanation:
Late in the 1950s, Carson turned her attention to conservation problems, the ones that she believed were caused by synthetic pesticides. In 1962, she wrote a book about her findings titled "Silent Spring", which brought environmental concerns to the American limelight. Silent Spring was met with fierce opposition by chemical companies, but it still went on to spurr a reversal in national pesticide policy, which led to a nationwide ban on DDT and other pesticides. And it also inspired a grassroots environmental movement that led to the creation of the U.S. Environmental Protection Agency.
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