Why does Beowulf boast about his heroic deeds before he goes to fight Grendel?

This bold speaking allows the people of Heorot to trust Beowulf and have confidence that he can slain the beast they call Grendel. Beowulf's heroic boasting is what makes him a great warrior, it allows him to prove himself and to show what he is capable of.  

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answer; ///(a) and (c) newspaper article and instruction manual; //so the answer is (e)

in macbeth, banquo, who in real life had willing in the murder of king duncan, is portrayed as a loyal subject of the king himself. many analysts believe that shakespeare had done this in order to king james, who supposedly was a direct descendant of banquo himself.

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