In what way is grendel a modern day monster rather than a traditional historical monster?
a) grendel is more animal-like than human
b) grendel is easily identifiable as a monster
c) grendels character has a multidimensional personality
d) grendel is inherently evil due to an evil spell

Grendel can be considered to be a modern-day monster primarily because there are so many human characteristics in him, and in the old days that wasn't the way in which monsters were portrayed. Here we can see that Grendel feels hatred towards the soldiers, that he is also afraid when he sees Beowulf, he isn't just a mindless monster lusting for blood, there is a reason behind him doing all the killings.

After reading this you would have got your answer :)

Hope this helps :)