The local fair held its annual photography contest and accepted entries from both amateurs and professionals.
Given that ...
The fair's photography contest accepted entries from both amateurs and professionals.
Why is it that ...
Most prizes ended up going to amateurs?
Evaluate
The counterintuitive idea is that we would assume that professionals take better photos than amateurs, and so professionals would be more likely to win top prize.
But maybe they are banned from some categories. Maybe there were uninterested in submitting their photos. Maybe some amateurs just really kick ass.
Goal
Get rid of the four answers that explain why amateurs won most prizes.
Typically, with EXCEPT, three of them might explain it one way and the remaining one might come at it from a different angle, so stay flexible.