The correct answer is C. The suffix -cy is indicating that the word is a noun, so the meaning should be eithef related to a concrete or abstract thing. The only meaning that can be related to an abstract idea is "the state of being false". Choices B and D refer to ideas tipically expressed by adjectives, as they are qualities. Choice A is the opposite meaning of fallacy.
"A theme can be related to what a character learns throughout the text"
Ahem. think of it this way, what word is interjecting
"This Idea came to me one evening 'or' I looked at my TV. Perhaps you meant 'When'