[Donut]

I believe in the given scenario only the elevated robot would score its 2 points, while the others would be touching something other than an elevated robot and would score nothing. However if the pile of robots shifted such that robot B contacted the tower and was held above 20" while robot A remained ELEVATED, the alliance would receive 4 points since robot B would still be considered elevated (above the plane of the platform and contacting the tower). C would still receive 0 of course.

This also brings up another potentially strategy: team A could build a ramp bot with a ramp/platform above 20". If they positioned themselves near the tower, teams B and C could drive on top of them and touch the tower with their robots. Both teams B and C would then be considered elevated and receive a 4 point bonus.