<span>The tone of the final words of the speaker is ominous. He is implying that the duchess is dead without outright saying she is thus. From a certain point of view, it could even be argued that he implies that he may have had a hand in the duchess' smiles stopping.</span>
It's important to look at the context clues in order to know why the wife was frustrated.
<h3>What are context clues?</h3>
Your information is incomplete as the story isn't given. Therefore, an overview will be given.
It should be noted that context clues simply mean the hints that are given in a literary work.
In this case, it's important to read and understand the story. Also, look out for the theme on the story and the relationship between the characters.
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D. a nuclear power plant.