Answer: C. "For only when our arms are sufficient beyond doubt can we be certain beyond doubt that they will never be employed."
Option A states that the United States continues to support the work of the United Nations, one of our best tools to maintain peace.
Option B states that both sides need to agree on a system to inspect and control weapons.
Option C argues that the United States needs to gather more weapons and strengthen its military. Kennedy says that only when the military is "sufficient beyond doubt" (definitely more than what is necessary), can they hope for peace.
Option D claims that very few people in history have been privileged enough to be able to fight for freedom.