Which system was challenged in hernandez v. texas? voter registration jury selection college admission right to work

The correct answer is Jury selection (second option)

Pete Hernandez's lawyer,  Gustavo (Gus) García argued that those who administered the process of jury selection introduced discrimination because of exclusion based on class; he pointed out that no person of Mexican origin had served on a jury for at least twenty-five years. The state admitted to the claim but argued that it was a mere coincidence, not a pattern of attitude and behavior.