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!!!
Actually, [b]parentheses[/b] add additional information, and they can be ignored. Probably
Is this supposed to be a story ?
The answer is D. <span>Writers follow the plot mountain as a guideline but may stray from it.</span>