The answer to your question would be that the sentence that can be used to depict the voice of a young character is the following one: We ran the cars and jumped in because we hated school.
I believe that this is the correct answer because of the word choices selected by the speaker. The verbs used are simple verbs of momevent (ran) or phrasal verbs (jumped in). Consequently, the tone is very informal, as opposed to the other sentences which make use of formal word choices adding a lot of description to the passage (eager to jump in our parents' cars, empty parking lot, bursting with excitement, dreaded school, glad to finally be leaving school).
Including Keffer's memory helps achieve the author's purpose because the author's purpose is to inform, and this informs the reader about pedestrians, and what they should do! It's important to know what Keffer remembered because it helps achieve the authors' purpose, and adds on to more information mentioned earlier in the text. It also gives us Keffer's point of view!
C. would be the correct answer
D on the page heheheHOHO big chunkyyyyy
