Change the following from active to passive:

Why did the editor disregard the major stylistic irregularities?

The correct option is: Why were the major stylistic irregularities disregarded by the editor?

To convert an interrogative sentence in the Simple Past tense from Active Voice to Passive Voice, follow these step-by-step grammatical rules:

1. Identify the key components in the Active Voice sentence:
- Question word (Wh- word): Why
- Auxiliary verb: did (indicates Simple Past tense)
- Subject: the editor
- Main verb: disregard
- Object: the major stylistic irregularities (plural)

2. Understand the Passive Voice structure for Simple Past interrogative sentences:

$\text{Wh- word}+\text{was/were}+\text{Object}+\text{Past Participle (V3)}+\text{by}+\text{Subject}?$

3. Apply the changes step-by-step:
- Retain the question word "Why" at the beginning.
- The object in the active sentence, "the major stylistic irregularities", becomes the subject in the passive sentence. Since it is plural, use the past tense auxiliary verb "were".
- Convert the main verb "disregard" into its past participle form (V3), which is "disregarded".
- Add the preposition "by" followed by the agent (active subject), "the editor".

Combining these parts gives the final Passive sentence:
"Why were the major stylistic irregularities disregarded by the editor?"