With 10, I can see why the other choices are wrong but I can't see why "B) human emotion" would be right. #help

Just from what you said, that sounds like very strange advice. Diversity is important to any good law school, so you would think that a "double URM" status would be something valuable. I'm not at all familiar with that "separate pile for multiracial students" concept, but I would definitely ask them to clarify.

Not only that, but I'm quite sure that being NA is your race, and being Hispanic is your ethnicity (like how there are people who are White and Hispanic, or Black and Hispanic), so this is rather confusing. I'm not sure if those people are considered biracial by admissions counselors or not.