What does the phrase "free territory" mean?

Which statement best paraphrases these sentences from the text

In what way is victor frankenstein, instead of his creation, most clearly monstrous? a.he disconnects from his family and friends. b.he wishes that he could control the world with his monster. c.he believes that he can achieve success in the scientific world. d.he becomes angry at the monster, even though he created it.

1. during the last thirty years of his life,tolstoy had a new , or purpose, forwriting