Answer: D) Before starting college, Jake learned how to speak Spanish and traveled across South America.
Explanation: parallelism or parallel structure 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. From the given options, the sentence that uses parallel structure, is the corresponding to option D, because it uses the same tense in the verbs "learned" and "traveled."