Answer :
The lines that best describe the reason for Grendel's anger in the epic Beowulf is this:
B. (11:53-55) when the Lord and Creator/ Had banned him and branded. For that bitter murder.
What made Grendel angry?
The reason for Grendel's anger in Beowulf can be traced to the fact that he was unhappy about being cast off into the thick forest because of his bad behavior.
Grendel had caused a lot of havoc in the Kingdom that the creator banned him from the midst of others and this caused a bitter hatred with the creature Grendel. Thus he resorted to causing more problems for others.
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