Correct option is C
Active Voice- It denotes that the noun or pronoun that acts as the subject in the sentence is the doer of the action. In other words, the subject performs the action or acts upon the verb.
Passive Voice- represents that the subject is one acted upon by the action or verb in the sentence. It can also be said that the passive voice indicates that the subject in the sentence is no longer active but passive.
· To change an active sentence into a passive one, we need to identify the object of the active sentence and make it the subject of the passive sentence.
· Then, we add the appropriate form of the verb "to be" and the past participle of the main verb.
· Finally, we add the preposition "by" followed by the subject (agent) of the active sentence (if we want to include it).