What conclusion can you make after reading the "the tell tale heart"?

The narrator is insane and killed the old man in the story.

Explanation:

The best answer for such question is letter A: Readers can identify with the narrator, making the issue of slavery less abstract. 

The autobiography is a detailed description of the many forms of violations made on African slaves during that time period. It gave the readers the chance to see it clearly in the light and they got a chance to read a firsthand experience on what was happening back then.