I do, i think its a decent song, but its not in my top 20.
The answer to your question would be that the literary device that enables readers to have mulitiple interpreations of a word, phrase, or event is the following one: ambiguity. That is, the correct option would be C.
Ambiguity, also known as fallacy of ambiguity, is a word, phrase, or statement which contains more than meaning. These words or statements lead to confusion. For instance, "Yesterday I rode a horse with sunglasses" is ambigous because it can be taken as if the one with the sunglasses was the horse.
The archetype of the cruel tyrant, exemplified by Dionysius, affects the story because
Damon and Pythias is a Greek legend that tells the story of two friends who believe in truth, honesty, and loyalty. When faced to dead by the tyrant Dionysius, they don't doubt to maintain their principles and to be loyal to each other.
They can't pass the exam unless they "study" hard.