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But there must be a line in which you should not go past in mentioning to school officials.
OK; I'm thinking that the obstacles faced by most underrepresented minorities is probably prejudice. So a typical essay might be how someone overcame a prejudicial obstacle. Some sadness there, I guess, but not tear jerkingly sad. So think of this level of sad story as the norm for this group of essay judges.
There's no way for you or anyone else to assess your essay topic/s without starting to write one. Just write one, then sleep on it before rereading it. Start with your most rewarding example of having overcome. You'll get a sense of it once it's written; and if not, then you can share it with someone who's judgement you trust.