What strategies do you use in identifying prepositional phrases, verbs, and subjects in a sentence?

Which of these sentences is the correct one?

Which of the following  correctly  completes the missing line (line ii) of the outline? a.why gilman advocates “rest cure”b.why gilman hates “rest cure”c.gilman’s opinion of “rest cure”d.gilman’s need to punish the doctor      select the best answer from the choices providedabcd

Ineed ,someone me on this and my other questions