What text evidence supports the fact that Grendel is unable to attack Hrothgar? Why is Grendel unable to attack Hrothgar?
a) Hrothgar's warriors protect him; Grendel fears them
b) Hrothgar is protected by God; Grendel cannot harm him
c) Hrothgar has magical powers; Grendel cannot approach him
d) Hrothgar is too well defended; Grendel cannot find a weakness