I believe the answer is B
Could I see the sentences, please?
C) The book what I bought is full of pictures of animals.
A writer wants to use an active voice when t<span>he subject of the sentence performs the action expressed in the verb. like for the sentence:
</span><span>The boy hugged the dog.
</span>the bold words show the subject performing the action (the dog) and the individual being acted upon (the boy). This is an example of a sentence using the active voice.
A.<span>The author wants to show that he is a superstitious person.</span>