It's usually an adverb. Ex. quickly, slowly, joyously..
Poseidon is his father and he feels abondoned from him and he also knows that he left him when he was little please please ask me more aabout percy jackson if you need help greek mythology is my fav:)
The correct option is B.
Jackie could not believe that Nora can act so religiously. He knows her sister to be a loud person and he considered her to be a worst sinner than himself, so he find it quite unbelievable that her confession only took a few seconds and she was acting as if she was a saint. Jackie considered his sister to be a hypocrite.