I believe the answer is C. Let me know if this helps
US plans to make an atomic bomb.
The debate during the Gilded Age was between "free-traders" and "protectionists". Generally, people in agriculture prefferred lower tariffs, because it enabled them to more easily export their agricultural products, which there was a surplus of in the US, and provided competition for industrial products, which would keep prices low.
For the opposite reason, people in more industrial areas of the country wanted higher tariffs, or a more protectionist policy, so that the manufacturing sector could continue to develop, and they wouldn't have to compete with foreign manufactured goods.
Answer:
Kennedy believed we should understand that freedom begins with our right to think, and that we should protect this right against a government that would try to limit our thoughts for its own purposes