You started this game by stating that no one writes well enough to meet the standards of Prospect Solution. I doubt that you do. What are your qualifications? I would state mine, but I don't want to intimidate you.
My comma wasn't misplaced. It was perfectly correct, although it could also be omitted.
I'm not interested in searching "sources" to point out basic grammar. Take a refresher course. I'm teaching one next semester.
Oh, so you're claiming typos? Well, I was trying to be gracious in saying that your answer could be correct. It isn't incorrect to say "the kind that need," but in the sentence you wrote, "needs" is better. That's all I said, and that's all I meant.
I'm not trying to be Dr. Samuel Johnson. But your habit of making disparaging remarks about others is offensive.