In Beowulf, how does Grendel die?

A. Beowulf grips Grendel and chokes him to death.

B. Hrothgar and Beowulf attack Grendel with iron spears.

C. In one-to-one combat, Beowulf tears off Grendel's arm.

D. The companions of Beowulf attack Grendel with their swords.