Parallelism is a stylistic device that is based on the repetition of words and sentences in a text. According to the above, in the first lines of President John F. Kennedy's inaugural speech, the resource of parallelism is used because the expression "as well as" is repeated to emphasize the idea of renewal and a new beginning that it meant this government. "symbolizing an end as well as a beginning - signifying renewal as well as change". So the correct answer is C
