Which was an effect of the Supreme Court case Plessy v. Ferguson?%0D%0A%0D%0AA. %0D%0AIt reduced the frequency of racial violence in the South.%0D%0A%0D%0AB. %0D%0AIt caused increased migrations of people from the North.%0D%0A%0D%0AC. %0D%0AIt weakened and outlawed Jim Crow laws in the North.%0D%0A%0D%0AD. %0D%0AIt reaffirmed and strengthened Jim Crow laws in the South.
