which sentence is written in the action voice?

a. The meal was being cooked when I arrived home.
b. The collaborative document is being shared with others.
c. Somebody painted a colorful mural on the classroom wall.
d. Raisins are made from grapes.

Sentence c, "Somebody painted a colorful mural on the classroom wall," is written in the active voice.

In the active voice, the subject of the sentence performs the action. Here, "Somebody" is the subject and they are performing the action of painting.

The other sentences are written in the passive voice, where the subject is the recipient of the action rather than the doer.