A or D, defanitly not B or C.
Most Likely A.
Its C because the scientist ended what he had to say
Considering that tone is the speaker´s attitude towards a certain situation and consequently it expresses a specific emotion (mood and meaning). In this case, we can infer that the person feels dissapointed, sad and perhaps a little bit upset. He or she would "say with expression" option C. test, hard. (In fact I would emphasize believe and test in the first sentence and hard in the second).
The evidence from the text that helps with the inference is that lady Macbeth is convinced that she sees the blood of Duncan's and Banquo's families on her hands.
<h3>What is an inference?</h3>
This is known as a conclusion reached on the basis of evidence.
Hence, we can see that from the complete story, Lady Macbeth's conversations with the doctor shows an evidence of her feeling guilty of the killings going with her words "<em>The Thane of Fife had a wife; where is she now? What, will these hands ne'er be clean?</em>"
Read more about<em> inference</em> here:
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