The answer is C: Edith Frank
You'd have to post the lines to get an answer.
The Rumble represents what is perceived to be a necessary physical release for this group of young males. In addition, the gangs agree to not bring weapons, so the perception is that it is unlikely anyone would be killed. In essence, a physical thrill that releases Endorphin and reassures the victors of their masculinity with a need to "dominate" others physically.
Is there an attachment to this?