Fitzgerald wants to portray and characterize the US society in the 30s. By making this question about race and their opinion about it, the author intends to characterize American society as competitive, a value that is repeated throughout the story. One of the main purpose of the novel, in fact, is to show how competitive, materialistic, and full of glamour the society is, especially the people who live in East Egg like Tom and Daisy.
Explanation:
it s the second and becos an active voice is done by the subject to the object
Actually, I am not too sure the question is well phrased. Translators do not decide on character development, conflict resolution or dialogue: they just need to stay faithful to the original text, those decisions are up to the original author.
so the best answer is "word choice", but that's not exactly "structural".
Unless the option of "dialogue" means the word choice in dialogue, but I don't think so.
I would say that a good answer would be "word order" or "grammatical construction".