Change the following from active to passive:
Why did the editor overlook the substantial stylistic anomalies?

Correct option is D

The correct active/passive voice of the given sentence is (d) Why were the substantial stylistic anomalies overlooked by the editor?
Explanation (rules + conversion): The active sentence is in Simple Past: did overlook. In passive voice, Simple Past becomes was/were + V3. Since the object “the substantial stylistic anomalies” is plural, we use were. Also, in question form, were is placed before the subject.
Structure:
Active voice: Why + did + Subject + V1 + Object?
Passive voice: Why + was/were + Object + V3 + by + Subject?
Active: Why did the editor overlook the substantial stylistic anomalies?
Passive: Why were the substantial stylistic anomalies overlooked by the editor?
Why other options are incorrect:
• (a) have been overlooked = present perfect passive, tense changes (wrong).
• (b) are being overlooked = present continuous passive, tense changes (wrong).
• (c) did … be overlooked is grammatically incorrect; after “did” we use base verb, and passive needs “was/were + V3.”
Information booster: In passive interrogatives, the helping verb (was/were/has been/is being) comes before the subject, same as normal question formation.