Answer:
B. Situational irony
Step-by-step explanation:
Situational irony is a literary tool used in making a different outcome from the expected outcome. It occurs when there's differences in expectation of what is to happen and what happened. In this case, Louise receives the news of her husband death which meant he was free from her wrath. The expectations of the way it would end at this point was very different from what then happened at the end which was the husband now receiving the news of Louise's death.