Answer: excuse me but could you explain further to make this question of yours explainable
The myth explains why mulberries are red.
At the beginning, the mulberries are "snow white", but when Thisbe kills herself at the end she falls on the mulberry bush and the myth explains that this is why the berries "reddens at its ripeness", because of the tragedy of Pyramus and Thisbe.
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".
The correct answer is B. she litters