Answer:
D. Once things are done, there is no need to dwell on them, to worry about them, or to decide who is to blame.
Step-by-step explanation:
Parallel structure (also called parallelism) is the repetition of phrases (or clauses) that have the same grammatical structure. The sentence that uses parallel structure is sentence D. Here, the infinitive form of verbs is consistently repeated (to dwell, to worry, to decide). In the rest of the sentences, there is always one form that sticks out:
- A. Science provides us with some answers, some questions, and figuring out how our world works. (instead of: ... and some ways to figure out...)
- B. As long as you use your best judgment, learn from your mistakes, and taking advice, you'll grow as a person. (instead of: ... and take advice...)
- C. Spring is a time for growth, renewal, and to rain. (instead of: ... and rain.)