Answer:
The story is set in Scandinavia in the 6th century. Beowulf, a hero of the Geats, comes to the aid of Hrothgar, the king of the Danes, whose mead hall in Heorot has been under attack by a monster known as Grendel. After Beowulf slays him, Grendel's mother attacks the hall and is then also defeated.
If I had gotten the lowest mark in the assignment, I would ask myself about the reason for this bad grade. A very probable reason is that I had not studied enough- probably I was distracted by other activities, such as watching a movie. However, since it resulted in a bad grade, I would want to change this behaviour next time and I would prepare for the exam instead of watching the movie!
I believe number 4 is the correct answer
A contrast or opposition between two things