What is the definition of situational irony?

A. Situational irony is the use of language that states the opposite of what is actually meant.
B. Situational irony is when a character flashes back to memories they had in the past in order to shed light on a current experience.
C. Situational irony is a contrast between a character's expectations and the audience's knowledge
D. Situational irony plays on the expectations that readers or the audience are likely to bring to a work

C. Situational irony is a contrast between a character's expectations and the audience's knowledge.