D. Mom should be capitalized because I believe it is a proper noun.
You can replace the word mom with a person's name. That is not always the case however. For example, I called my mom on my.... If you capitalized mom in this sentence and put a name then it wouldn't make sense because the word my was added. Hopefully this helps and makes sense. Good luck!!!
I believe they were walked to the guillotine and told to kneel at the head of it. They would then be executed while people watched. It was brutal in that time.
Answer:
I think this means that the dead wood (useless/burdensome people or things) are the same anywhere they are. So the useless are useless not only in one situation but useless all around.
Explanation:
Example: He cut the "deadwood" from the group. So he is getting rid of the useless people in the group.