C. because the nouns and time come together to make sense with the verb
1 and 4 I hope this helps I think it's the right answer but i'm not sure
Explanation:
3. To learn additional details about the topic of the test
but also 4. To focus on the texts purpose
The correct answer is <span> A.Once things are done, there is no need to dwell on them, to worry about them, or to decide who is to blame.
Parallel structure means that the same form of a word is used throughout a sentence - here, the infinitive form of verbs is used: to dwell, to worry, to decide.
The rest of the sentences change the form of a word and are not consistent, which is why they don't have parallel structures. </span>
