Which sentence uses parallel structure?

• A. The patient is advised to rest, to hydrate, and to report any fever.
• B. The patient is advised to rest, hydrate, and reporting any fever.
• C. The patient is advised to rest, to hydrate, and reporting any fever.
• D. The patient should rest, to hydrate, and report fever.

Answer: (A)

Parallel structure is about keeping the same grammatical form when listing actions after an introductory verb. Here, the instruction tells you to perform a series of actions, so each item in the list should have the same form. The sentence uses the infinitive form consistently: to rest, to hydrate, and to report. This creates a smooth, balanced rhythm and makes the instruction clear. The other options mix different forms—one uses a gerund (reporting), another combines bare verbs with an infinitive, and another mixes forms like rest, to hydrate, and report—so they don’t read as cleanly or feel as consistent. That uniformity in form is what makes this sentence the correct choice.