The events that happens as a result of a change in the "general temperament and character" of the narrator in "The Black Cat" is C. He starts abusing his wife and favorite cat, Pluto.
According to the events in "The Black Cat", we are told about the story of an alcoholic whose addiction takes his life on a dangerous trend where he ends up killing his cat.
Furthermore, an identical cat to the one he killed, begins to torment him and drives him mad and delusional
As a result of this, he begins to abuse his wife in a desperate attempt to turn his frustrations to someone.
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