The principle that government can only do what its people give it the authority to do is called separation of powers.
O popular sovereignty.
O limited government.
checks and balances.

Which of these marketing methods henry ford sell the model t to many people who had never before owned a car? a) offering free maintenance on cars for a full year b) airing television commercials with memorable slogans c) advertising with the new communication outlets such as radio d) offering many different colors and models for buyers to choose from