Which four geographical boundaries have insulated the united states in the past

Brainliesttt !me : ) what was the result of indian independence?

Which of these innovations led to increased production in american factories in the early 1800s? a. the use of interchangeable parts b. the construction of canals c. the invention of the mechanical reaper d. the availability of electricity

What industry was exempt from the child-labor laws passed in the factory act of 1833?