The answer choice that describes a moment of situational irony in Narrative of the Life of Frederick Douglass is:
Mr. Covey tries to whip Douglass for being disrespectful, but Douglass fights back, which makes Mr. Covey respect him.
This statement presents a situation where one would expect that Mr. Covey's violence would instill fear and subservience in Douglass, but the opposite occurs: Douglass's act of fighting back leads to a newfound respect from Covey. This reversal of expectations illustrates situational irony.