After the United States entered World War I , how was the civilian population able to meet labor demands?

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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

How should the student cite this source using mla citation format?