Final answer:
Kennedy's purpose was to inspire Americans to embrace the challenges of the 'New Frontier' and contribute to national progress, rather than offering a set of specific promises.
Step-by-step explanation:
John F. Kennedy's purpose in making these statements during his Nomination Speech was A. to challenge Americans, especially young people, to join him in the fight for change in this new era. His speech outlined the concept of the 'New Frontier', which was not just a collection of promises, like those seen in Woodrow Wilson's New Freedom or Franklin Roosevelt's New Deal, but rather a series of challenges. He sought to inspire a pioneer spirit among Americans, urging them to contribute to national progress and to embrace the fight against unknown opportunities and perils. Kennedy's vision of progress extended beyond domestic policy, as he inspired the creation of the Peace Corps and sought to improve the United States' role in international affairs. His speech avoided making specific, easily quantifiable promises and instead called for collective effort and sacrifice from the American people.