Answer: B. The King of Denmark.
Step-by-step explanation:
Beowulf is the main character in the story, and he helps Hrothgar when his kingdom is threatened by Grendel, a demon descended from Cain.
Beowulf helps Hrothgar, king of the Danes because Hrothgar helped Beowulf's father a long time ago.
Hrothgar even becomes a father figure as well as an example of leadership to Beowulf.