Answer:
c) troubled .
Step-by-step explanation:
The story of "Grendel" as told from the monster's perspective by John Gardner is based on the epic "Beowulf". But this story takes the readers through the eyes of the dreaded monster and presents the story from his perspective.
As given in the excerpt, Grendel knows the dread and fear his presence has on those around him. Whenever he's there, "wolves would cower" and he also admits he's "filled with a wordless, obscurely murderous unrest". This shows Grendel as a troubled monster who feels aloof and can't do anything about it.
Thus, the correct answer is option c.