Read the following excerpt from President John F. Kennedy's "We Choose to Go to the Moon" speech. Then, answer the question that follows.

I do say that space can be explored and mastered without feeding the fires of war, without repeating the mistakes that man has made in extending his writ around this globe of ours.

Which rhetorical device does Kennedy use to support his argument?

a) Antithesis: he is contrasting space with fires

b) Figurative language: he is using alliteration and an idiom to calm the audience about the space race

c) Irony: he is saying the opposite of what he means about fires

d) Rhetorical question: he issues a statement about fire in the form of a question

a) Antithesis: he is contrasting space with fires

Kennedy uses antithesis by contrasting the peaceful exploration and mastering of space with the destructive fires of war, highlighting his belief that space exploration can be done without conflict.