Which comparison of beowulf and grendel is most accurate?

a)grendel is characterized as sensitive in the poem, but he is characterized as cruel in the novel.
b)both the poem and the novel are all about grendel; he is the main character in both stories.
c)in the poem, grendel seems like a heartless monster, but in the novel he is emotionally complex.
d)the poem and the novel are very similar, and both characterize grendel in the same way.