Read the following excerpt from President John F. Kennedy's "We Choose to Go to the Moon" speech. Then, answer the question that follows.
This country was conquered by those who moved forward—and so will space. William Bradford, speaking in 1630 of the founding of the Plymouth Bay Colony, said that all great and honorable actions are accompanied with great difficulties, and both must be enterprised and overcome with answerable courage.
Which rhetorical device does Kennedy use to support his argument?
a) Antithesis: he is contrasting what the colonists did to what he wants to do
b) Figurative language: he is using an allusion to connect the colonists' bold actions to space exploration
c) Irony: he is saying the opposite of what he means about the colonists
d) Rhetorical question: he issues a statement about the colonists in the form of a question