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.
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Either
The overpopulation problem is so dire that selecting some humans to be a food source is a just solution.
Or
There are no reasonable objections to the author's proposal.
ANSWER is option D.
Because if you think about it, the Atlantic is a vast distance, but a puddle really isnt. So comparing such a large distance (the Atlantic) to such a small one (puddle) is understatement.