I think it would be "them"
The correct answer is C. Ordinary characters can do great good. As he himself says it in the book, Bilbo is a Baggins from Bag End and it should remain that way. He is an ordinary person living an ordinary life, but strangely is sucked into a world of magic and adventure. In the end, he does great things and changes the future of the entire world.
So you can look professional when you write late in life.
