They fixed the 9 th of September as the date of marriage. Basic rules
Right Answer is: C
Basic rules to be followed for Active/Passive conversions are:
1. The object of the active verb becomes the subject of the passive verb.
2. The finite form of the verb is changed (to be+ past participle).
3. The subject of the active sentence becomes the object of the passive sentence (or is dropped).
4. Preposition ‘by’ is used before object.
The given sentence is in active form of simple past tense. The structures for active/passive voices are:
Active: Subject + verb (IInd form) + object…
Passive: Object + was/were + verb (IIIrd form) + by + subject…
Hence from the given structure option C is the correct answer.