Final answer:
Beowulf qualifies as an epic poem because it features supernatural elements and heroic deeds.
Step-by-step explanation:
The qualification of Beowulf as an epic poem can be attributed to its feature of supernatural elements and heroic deeds. Unlike option A, which states that it is written in a modern language, Beowulf is actually written in Old English. Option B is incorrect because Beowulf does indeed have a heroic protagonist. Therefore, the correct answer is C) It features supernatural elements and heroic deeds.