Question

Which of the following is an incorrect usage of a possessive pronoun?
A. The dog lay on its stomach
B. He bought their gifts yesterday
C. The children took turns giving the goat it's food

I think the right answer is C but I am not sure

Answer 1

The answer is A. If it was "the dog lays on its stomach" it would be correct.

Answer 2

You are correct, it's is short for it is, which is not possessive and does not make sense in the context of the sentence.