Answer: C) Before starting college, Jake learned how to speak Spanish and traveled across South.
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 correct parallel structure, is the corresponding to option C, because the verbs on the list are in the same tense (learned and traveled).
Twain uses irony and sarcasm to characterize the king and duke in such a way that communicates his belief that pretending to be something you are not (for the sake of appearances) is both ridiculous and embarrassing.