Answer:
But to-morrow I die, and to-day I would unburthen my soul.
Step-by-step explanation:
Falling action generally follows the climax of the plot and takes the story towards the resolution of the conflicts contrary to the rising action that includes the decisions that lead to the climax. It associates with the wrap-up of the narrative and moves towards closure. In "Black Cat", the falling action occurs when the protagonist was caught while burying his wife under the wall and cat mews as police were looking for him. Thus, the phrase that best exemplifies the resolution of the conflict is "But to-morrow I die, and to-day I would unburthen my soul" that suggests the protagonist's acceptance of his evil deeds and discharging his soul of the burden that indicates a resolution to the internal clash he was going through.