Because its referring to you. And when you refer to someone or yourself you capitalize. Its also part of a proper noun.
A. <span><span>I'd love to stay and talk, but—yikes! I'm really late now.
</span>This is the correct answer. The dash here is used properly because it shows the break in thought, and it changes the tone of the speaker. That is one use of dashes.
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B. </span></span><span>Today we studied a poem, did an experiment, and multiplied fractions. (The sentence doesn't need the dash.)
C. </span><span>The coat—one of the most colorful that I've seen--seemed to be made of string. (It needs another dash after seen.)
</span>D. <span>There on the stage was my sister! (Does not need the dash.)</span><span>
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Do you have any other questions?
"<span>c. a comparison of the amount of profits that the club will make with and without the donation" would be the best option since this is the only way to tell if they're telling the truth or not. It would be best to use a third-party source.</span>
It is the mood, character, quality, tone, atmosphere, of an area. U get to judge