Discribe the economy of the us in the 1920s

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

What are the strengths of the byzantine empire?

How many countries have signed the kyoto protocol?