What effect does an unreliable narrator have on the reader?

a. to make the reader feel sorry for the narrator's inability to fit in with the setting
b. to allow the reader to see the thoughts and actions of all the characters
c. to make the reader question the narrator's credibility and trustworthiness
d. to make the reader angry about the narrator's lies and lack of honesty

The best choice here is C. unreliable narrators are often used to confuse the reader, or keep them on their toes. reliable narrators see things clearly and relay events truthfully, but unreliable narrators see things from a warped point of view that can keep readers in the dark.

we don't necessarily always feel sorry for unreliable narrators; sometimes their misfortune is self-inflicted (A). unreliable narrators only give you their warped perspective, and they could potentially alter or misinterpret the actions of other characters, so choice B is incorrect. while unreliable narrators might irritate readers because they prove to be confusing, that isn't their sole effect on a reader. their warped perspective is meant to make you question them, and try to look for hidden meanings or hints.