Answer:
The best option concerning how Grendel's characterization in "Beowulf" differs from his characterization is "Grendel" is:
B. In "Beowulf" he is a static character, but in "Grendel" he is a dynamic character.
Explanation:
In literature, a static character is one that does not undergo important change. He is basically the same from beginning to ending. On the other hand, a dynamic character does go through important internal changes as the plot unfolds. Those changes can be emotional or psychological, for instance.
In the epic poem "Beowulf", the character Grendel is described as a monster incapable of feeling. He seems to exist solely with the purpose of terrorizing and killing men. However, in John Gardner's "Grendel", the character is developed further. He has feelings, and he suffers precisely because he is not capable of conveying those feelings. His actions are misinterpreted, his monstrous appearance being all everyone can see and judge upon. Thus, we can safely say that, in "Beowulf", Grendel is a static character, while in "Grendel" he is a dynamic character.