Transform the following sentence into active voice:
Were you instructed by them how to fill in the form?

Correct option is D

The correct active/passive voice of the given sentence is (d).
Explanation: The original is a passive interrogative in the simple past: Were + you (object) + past participle (instructed) + by them + complement. To convert to active in simple past interrogative, use do-support: Did + subject + base verb + object + complement? → “ Did they instruct you how to fill in the form?”
Structure:
· Active voice: Subject + V2 (or did + V1) + Object + Complement
· Passive voice: Be (was/were) + V3 + by + Agent + Complement
· Example: Passive: “Were the students taught by the trainer to fill the sheet?” → Active: “ Did the trainer teach the students to fill the sheet?”
· Information booster: In simple past passives, questions begin with was/were; the corresponding active questions begin with did + V1 (base form). Keep the interrogative order (auxiliary before subject) intact during conversion.