Respuesta :
The only sentence which uses correct parallel structure is the last one - Before starting college, Jake learned how to speak Spanish and traveled across South America. A parallel structure means that the same tense is used throughout the sentence, and this is the only sentence where that is the case - both verbs are in the past simple tense.
Answer: D) Before starting college, Jake learned how to speak Spanish and traveled across South America.
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. From the given options the sentence that uses correct parallelism or parallel structure, is the corresponding to option D: Before starting college, Jake learned how to speak Spanish and traveled across South America, because the verbs are in the same tense "learned" and "traveled."