A. slaves should be counted among a state's population for the purpose of deciding the state's number of congressional representatives.
Washington's efforts failed because white settlers ignored the treaties and moved onto Native Americans' land.
The correct answer would be D) local authorities' refusal to integrate Central High School. I say this because it is the only logical answer.
Samuel de Champlain is primarily known for his diplomatic efforts as well as his exploration adventures, since he was the explorer who officially settled "New France" in the New World.