Basically, just fill out what you think the reason would be for each of these admission outcomes for your application.
I'll go first:
Accepted: Scores are above the school's 75th percentile. Ranked #1/600ish. Strong leadership in regional organizations, one of the top high school bassoon players in CA, lots of comm service, 2 good recs.
Deferred: mediocre essays, 1 rec i have doubts about, not nationally-ranked, essays don't pop out, not-so-great interview.
Rejected: scattered interests, lots of other applicants from my school, recs turned out worse than i thought