Which sentence demonstrates correct parallel structure in a series containing -ing verb forms?

Which sentence demonstrates correct parallel structure in a series containing -ing verb forms?

• A. Her responsibilities include analyzing data, preparing reports, and presenting findings.
• B. Her responsibilities include analyzing data, to prepare reports, and presenting findings.
• C. Her responsibilities include analyzing data, prepared reports, and presenting findings.
• D. Her responsibilities include analyzing data, preparing to report, and presenting findings.

Answer: (A)

When a verb like include introduces a list, the items that follow should share the same grammatical form. Here, the list uses three -ing forms: analyzing data, preparing reports, and presenting findings. Keeping every item as a gerund keeps the sentence balanced and clear, which is the essence of parallel structure. Other options break that balance by mixing forms. Using to prepare reports introduces an infinitive where the others are gerunds, which disrupts the rhythm. Using prepared reports changes one item to a past participle instead of a noun form, so it no longer matches the others. Combining preparing to report mixes an -ing form with an infinitive, breaking the parallel pattern. Maintaining all items as -ing forms makes the duties feel like equal, ongoing responsibilities.

When a verb like include introduces a list, the items that follow should share the same grammatical form. Here, the list uses three -ing forms: analyzing data, preparing reports, and presenting findings. Keeping every item as a gerund keeps the sentence balanced and clear, which is the essence of parallel structure.

Other options break that balance by mixing forms. Using to prepare reports introduces an infinitive where the others are gerunds, which disrupts the rhythm. Using prepared reports changes one item to a past participle instead of a noun form, so it no longer matches the others. Combining preparing to report mixes an -ing form with an infinitive, breaking the parallel pattern. Maintaining all items as -ing forms makes the duties feel like equal, ongoing responsibilities.