I think it might be C.. Hope this helps. Even though its late :(
<span>I only have two.
" I labor the earth from dawn of day to blink of night..."
</span><span>"We will slide together into our pit."</span>
Sentiment
This means that the feelings for a new mayor were strong.
The climax of MacBeth is almost in the exact middle of the play. He got away with the Murder of Duncan, although Dante would put him in one of the lowest places in Hades. The killing of your ruler while offering hospitality is an immeasurable crime.
Having said that, the murder of Banquo is the climax. His son gets away thus leaving room for the witch prophecy to come true. That's when things start going awry. It's all downhill from there.
Answer: Banquo's Murder
A counterargument is just someone disagreeing with the original argument so they come at them with a counter argument so i would say A. To respectfully address any doubts or objections to the claim.