Final answer:
Grendel is a creature from the poem 'Beowulf' who consumes a dozen warriors during raids on the mead hall Heorot, corresponding with option C) A dozen.
Step-by-step explanation:
The character Grendel is from the Old English epic poem Beowulf. In this poem, Grendel is a monstrous creature that terrorizes the mead hall Heorot. When he attacks the hall, Grendel consumes a dozen warriors in a single raid. This would correspond to option C) A dozen. The story of Grendel's raids and the subsequent heroics of the protagonist, Beowulf, is an important part of English literature and studies on Anglo-Saxon history and mythology.