the couplet form support the meaning of the lines:
a. by completing the speaker's thought
A. attach on the dragon. we had this as a question last week during academic week in the Beowulf test. key component: it says LEADER of the Geats(Swed) and that means AFTER he killed Grendel and became King so it eliminates D when hes chasing Grendel. the other two options are just... no ._.,