[dhitchco]

I posted a different answer; but then went and re-read the rules (section 4.3.1).

It doesn't matter what occurred DURING the 2:15 match. It ONLY matters what the tetras look like AFTER the buzzer.

In this case, the correct answer is #6.

All three of the tetras are NOT properly "seated" (within 6" on all four apexes) on to what is called the "supporting structure" (the goal or any tetra underneath.

Although it looks like one red tetra and one blue tetra was properly seated at some point during the match; at a later point in time the 3rd tetra (2nd red) dislodged BOTH of the other tetras, therefore nullifying everything.

In the real world, a lot of stuff happens. There is no way to write rules/laws that accommodate for every permutation. I've seen a lot of these weird stacks at three different regionals, as well as a stack of seven that got completely toppled during the match. I expect to see a lot of on-field YMTC decisions during Nationals as well. let's all have FUN and be gracious professionals.