Choose the correct active voice form of the sentence:
"All the books had been neatly arranged on the shelves by my grandfather."

Correct option is D

The correct active voice of the given passive sentence is (d) My grand father had neatly arranged all the books on the shelves.
Why? The passive sentence uses past perfect passive “had been + past participle (arranged)”. Converting to active keeps the past perfect “had + past participle (arranged)” with the original agent by my grandfather becoming the subject My grandfather. “Neatly” (adverb) is retained before the verb phrase.
Rules of conversion (Passive → Active) with structure:
· Passive Voice: Object + had been + V₃ + (by + Agent) + (Place/Time).
· Active Voice: Agent (Subject) + had + V₃ + Object + (Place/Time/Modifiers).
· Check options:
· (a) has arranged = present perfect → wrong tense.
· (b) Past perfect but missing adverb “neatly” → incomplete vs the source.
· (c) have with singular subject → agreement error.
· (d) had neatly arranged → correct tense, adverb placement, and meaning.
· Example: The work had been completed by the team. → The team had completed the work.
· Info booster: In tense transformation, keep the same tense and adverb position; only swap subject/object and remove “been” + “by”.