What to areas of the world has the most acts of genocide during the 20th century

This law states that the "chinese laborers to this country endanger the good order of certain localities" in the united states. which of these would represent a "locality" that would most likely have wanted this law created and passed? a) dallas b) chicago c) atlanta d) san francisco

What role did the alliance system play in preventing austria-hungary and serbia from coming to a compromise settlement?

When top-roping is used, how long should the rope be in order to protect the climber throughout the climb?