Answer: A) Parallelism.
Step-by-step explanation: parallelism is a literary device that consists in the repetition of the grammatical structure of different words or phrases in a sentence or paragraph, in order to emphasize an idea or to create an impact in the audience. In the given excerpt from John F. Kennedy's Inaugural Address we can see that he uses parallelism when he lists the elements: "pay any price, bear any burden, meet any hardship, support any friend, oppose any foe."