How does Grendel's characterization in Beowulf differ from his characterization in Grendel?

(A.) In Beowulf, he is a round character, but in Grendel, he is a flat character.

(B.) In Beowulf, he is a story character, but in Grendel, he is the story's narrator.

(C.) In Beowulf, his family is part of the story, but in Grendel, he is a solitary monster with no family.

(D.) In Beowulf, he is a static character, but in Grendel, he is a dynamic character.