Mark the sentence that is grammatically correct.
Group of answer choices

A. Our dog cut it’s paw and David thinks its time to call the vet.

B. Our dog cut it’s paw, and David thinks it’s time to call the vet.

C. Our dog cut its’ paw and David thinks its time to call the vet.

D. Our dog cut its paw, and David thinks it’s time to call the vet.