Answer:
D. repetition of a phrase for emphasis
Step-by-step explanation:
According to the speech made by John F Kennedy on June 26, 1963, he condemned Communism and tried to make a case to show that democracy is better.
The method that best describes the rhetoric John F Kennedy uses in his speech to convince people that Germany is undergoing a revolutionary moment is the repetition of a phrase for emphasis
The phrase "Let them come to Berlin" was used repeatedly.