Which piece of evidence BEST supports the claim, "The wide gap between rich and poor people in cities created different urban experiences."
O The wealthy built large, expensive, mansions; the working poor lived in crowded tenements.
O The introduction of the electric streetlights, police departments, and mass transit made cities safer and easier to move around in
O Factory labor worked long hours in dangerous conditions with little pay, including young children.
O Mass entertainment exploded with the introduction of professional sports like baseball and boxing