Research That Has Examined the Penalty Records of Professional Football

Research that has examined the penalty records of professional football and professional hockey teams has found what connection between team jersey and aggression?

A) Teams that wore red jerseys were penalized more often for more aggressive play.
B) Teams that wore black jerseys were penalized more often for more aggressive play.
C) Teams were more likely to play aggressively during home games than away games, regardless of jersey color.
D) There is no relationship between jersey color and aggressive play in either sport.