The reason why Beowulf is likened to the perfect medieval knight is because D. he was determined to confront a dangerous creature.
Medieval knights were noted for their bravery and willingness to confront danger in order to keep civilians safe.
Beowulf willingly chose to confront Grendel and his Mother who were both dangerous creatures. This shows that he fits the definition of a perfect medieval knight.
In conclusion, option D is correct.
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