Rewrite the sentence in active voice.
A few bags were bought by me.

Correct option is C

Explanation: "A few bags were bought by me" in the past passive form converts to "I bought a few bags" in the simple past active form. This reflects a straightforward past action completed by the speaker.
Grammatical rule used: Simple past passive is converted to simple past active to indicate completed past actions.
Conversion rule:
Past indefinite
Subject + V2 + object. -> <- Object + auxiliary verb (was, were) + past participle + by + subject.
Example: The dinner was cooked by him. -> He cooked the dinner.