Grendel's ancestors were banished to the slime because A. Were monsters B. We're descendants of Cain C. Opposed the lords will D. Had disturbed hrothgars brother
The correct answer is B. Grendel's ancestors were banished to the slime because they were descendants of Cain. To arrive at this answer, one must be familiar with the epic poem "Beowulf" in which Grendel is a prominent character. Grendel is portrayed as a monstrous being who terrorizes the kingdom of Hrothgar.
In the poem, it is mentioned that Grendel and his kin are descendants of Cain, who was cursed by God for killing his brother Abel. The curse placed upon Cain and his lineage made them outcasts and brought them eternal misery. Grendel's banishment to the slime is a consequence of his cursed lineage, a punishment for the sins of his ancestors.
So to answer your question, the correct answer is B: Grendel's ancestors were banished to the slime because they were descendants of Cain.