C is your answer im pretty sure
Although many people in the world have claimed to be highly educated would be the best anyone can have that doesn’t outweigh the fact that many teens around the world are dropping out of high school and earning more then other adults doing things that school doesn’t teach. Just think instead of wasting your time at a school full of ignorant people you could be investing your time in something else that would actually give you a good future.
My guess is A. Not a tone of info to go with, but I am a sarcastic god.
I think it is D.
'It' makes the sentence unclear in purpose
If you put each of the possible answers in the blank and read the sentence the right answer would be C.