Hello,
The correct pronoun is
Its
The Puppy chewed on its bone. Pronouns are words that replace nouns. In this case, the word "its" is the pronoun.
Best Of Luck,
- I.A. -
The answer is c. A and B don't make any sense since they mean different things and also D is wrong because it doesn't meant the right thing so your best option is C. :)