I thinks it's B but C can also be an answer but I would go with B
Answer:
<em><u> </u></em><em><u>C. whom</u></em><em><u> </u></em><em><u> </u></em><em><u> </u></em><em><u>is</u></em><em><u> </u></em><em><u>the</u></em><em><u> </u></em><em><u>right</u></em><em><u> </u></em><em><u>answer</u></em>
The answer is: Serious and forceful.
Tone: Is an attitude of a writer toward a subject or an audience. Tone is generally conveyed through the choice of words, or the viewpoint of a writer on a particular subject. In this case Lake´s words give the impression he is being serious and forceful.
