Which sentence is in the active voice?

Correct option is C

The correct option is (c).

In active voice, the subject performs the action directly. In the sentence She reads a book every day, the subject She is doing the action reads. Hence, it is in active voice.

Step-by-step reasoning:

• Find the subject: She.
• Find the verb/action: reads.
• Check whether the subject performs the action: Yes, She performs reads.

Rule and structure:

• Active Voice: Subject + Verb + Object
• Example: She (Subject) reads (Verb) a book (Object).

Why other options are incorrect:

• (a), (b), (d) are in passive voice because they follow the pattern was/were + V3 + by, where the object becomes the subject and the doer is introduced using by.

So the correct answer is (c)