Bequeathed- C. He left his collection of books to the local library.
Posterity- B. The future generations will have the right to blame the predecessors for their suffering.
Explanation: The three lines show that Grendel has adapted to being a monster and he is mastering being a monster without caring.
I do not know if this helped it was not a lot of information from this sentence so sorry if it is wrong.
The answer is C! you’re welcome
I believe it’s a hyperbole sorry if I’m wrong