C. The phrase that most accurately sums up Franklin D. Roosevelt's purpose is to get the public to start being more optimistic about the country, i.e., option C.
More about Franklin D. Roosevelt:
Franklin D. Roosevelt was inaugurated as the 32nd President of the United States on Saturday, March 4, 1933, at the East Portico of the United States Capitol in Washington, D.C.
The statement best describes Franklin D. Roosevelt's purpose is to get the public to start being more optimistic about the country. Thus, the correct option is A.
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