In the first section of Beowulf, which part is most clearly exposition?

A.The tense verbal exchange between Unferth and Beowulf
B.The fight between Beowulf and Grendel when Grendel loses his arm
C.The 12 years of hardship that Hrothgar and his people suffer because of Grendel
D.The meeting between Beowulf and the Scylding coast guard when the ship arrives