The correct answers are:
- The narrator is purposely misleading the audience.
- The narrator is prone to exaggerating or bragging.
- The narrator is naive or inexperienced.
The purpose of an unreliable narrator is to deceive the reader while building up suspense until the end of the story, or a major plot twist; in other cases, an unreliable narrator would simply stall the story with exaggerated details as a means to desperately create surprise and engage the reader.
A narrator can also be considered unrealible due to naivety. This happens whenever an event is reported inconclusively and with no detail, as the narrator describes these facts using their short-scoped understanding of the scene.