The answer here is 3. Diction
B . They illustrate a strict adherence to social rules.
Using my common sense and a bit of knowledge in English, I can infer that she feels strongly about her garden and loves it very much. This leads me to believe that she is a loving and caring character. If something is described vividly this generally means that 1) this is a good writer 2) they feel strongly about what they are writing 3) both a good writer and a strong feeling
B. The punctuation belongs outside of the parenthetical citation.