Depending on what the definition is to curb! But here is one that works both ways and is control
A) to analyse the theme in a piece of narrative writing
The answer is letter C.Grendel's Mother
Grendel's mother is one of the antagonists of Beowulf. She is known to be one of the descendants of Cain. She had attacked Heorot as a form of revenge. Beowulf had tried to kill her as he went to her cave with the hopes to kill her.
So that if something is not correct they doblethink to make sure and find the solution.