Questions: A story's narrator is UNRELIABLE when... * they are friendly and give correct information their stories are consistent with the other characters' accounts they deny that they are mad, even when their actions say otherwise

The answer is: they deny that they are mad, even when their actions say otherwise.

Explanation for each option:

1. They are friendly and give correct information: This option is incorrect because a narrator who is friendly and provides accurate information is generally considered reliable. Reliability in narration is often judged by the consistency and truthfulness of the information provided.

2. Their stories are consistent with the other characters' accounts: This option is also incorrect. If a narrator's stories align with the accounts of other characters, it suggests that the narrator is reliable. Consistency with other characters' perspectives typically indicates that the narrator is trustworthy.

3. They deny that they are mad, even when their actions say otherwise: This option is correct. An unreliable narrator often denies their own instability or madness, despite their actions clearly indicating otherwise. This discrepancy between their self-perception and their behavior is a hallmark of an unreliable narrator. For example, in Edgar Allan Poe's "The Tell-Tale Heart," the narrator insists on their sanity while describing actions that suggest otherwise, making them unreliable.