Lethargic means lazy, depressed, whereas vital means full of life. As you can see, these two words are antonyms, meaning that they have completely different meanings. So, in order to finish the analogy, we need to find the antonym of the word trite. Trite means cliche, overused, so its antonym would be original, unique, or something in that vein.
So, the correct answer could be original.
I think it is a noun phrase, and not appositive.
The answer is: C. One must follow one’s own moral code, no matter the price.
In the first excerpt from "The Royal House of Thebes" Antigone has buried Polyneices, she was following the god laws and her beliefs, despites Creon edict and the possible consequences of her acts, in the second one the author is talking about the strength of the woman in Britain.