<span>prejudice in favor of or against one thing, person, or group compared with another, usually in a way considered to be unfair.</span>
The answer is C. Sequential and good at math
The answer is tells because the other answers are not neutral.
The last one. The only scenario where you wouldn't put a comma in the first quote is if it's a completed remark that uses particular punctuation such as a quotation or exclamation mark, but never a period. Hope this helped.