How did mass production most directly affect Americans' standard of
living in the 1920s?

During the 1920s, revolutionary mass-production techniques enabled American workers to produce more goods in less time. Because of this, the economy boomed. The automobile industry played a major role in the boom. Carmaker Henry Ford introduced new methods and ideas that changed the way manufactured goods were made.

lincoln won 212 electoral votes to mcclellan's 21 votes, and lincoln beat mcclellan. is the main reason lincoln won in 1864.