From where did legislators ideas for the bill of rights come?

How did the roaring 20s mark the end of the progressive era? a. mass production reduced wealth disparity and turned public opinion pro business b. labor unions won big legislative gains in workers rights and disbanded c. public officials cut taxes on businesses and reduced spending on services d. america increasing influence in world affairs redirected public attention to foreign policy

Why do many scientists suppose the land bridge theory of migration?

Which piece of information would most a historian create an interpretation of this photograph of works in a factory?