Answer:
The answer is their.
Explanation:
The reason why it is "their" because, if you were to use his, or its the main thing is that it wouldn't flow or sound right. That is the firs sign that the answer isn't correct. The other way to tell is because "his" doesn't mean more than one. And the last thing is that "its" isn't a pronoun for living things, that would be for inanimate objects.
