What reforms were not passed in the early 20th Century that affected the lives of many Americans?

Which of the following best describe deflation

The information box says that the han added 4,000 miles of wall.refer to the mileage scale.how can this be true?

How did the writing of the constitution demonstrate the political process? definition of political process by merriam webster: the process of the formulation and administration of public policy usually by interaction between social groups and political institutions or between political leadership and public opinion.