The answer can honestly be A or C. In some versions of the story, the monster begins to weep after his creator, showing that he still had love for him. However, there's also versions where he begs the magistrate to kill him, as he doesn't want to have another victim.
I think your best bet is to go with A.
The first blank is "Tried"
The second blank is "Wanted"
Hope this helps! :)
Repetition is used because they state several times that they would do anything. And the other two are not rhetorical devices anyway.