Team B was Clearly at fault. Team A's arm was extended during the match up until the point of the accident. Team B was moving toward Team A as well was Team A moving towards Team B. Team B made no attempt to bring their robot to a hault, therefore resulting in the tipping of Team B's robot. Team A, a highly sophisticated beast was accused for malicious acts, but they also thought ramming was malicious.
G'Luck with everyones Regionals, we will be dominating at NASA.