Why was I selected as a candidate for Regents for Berkeley?

I was wondering how they select regents scholars candidates, as my stats aren’t the greatest (I had a 34 ACT when I applied and a 2190 SAT, but I had a 4.0 when I applied) and I did not list any eye-catching accomplishments or extracurriculars. I’m very liberal though and can fit into the campus climate of Berkeley. I’m happy about the email, but I’m kinda confused at the same time. How do they select regent candidates? Is it based on stats or essays or extracurriculars or personality?

http://financialaid.berkeley.edu/regents-and-chancellors-scholarship