How did the name “uncle sam” originate?

How many people in the world’s economy work in “system d”?

The civilian conservation corps (ccc), an agency established during the great depression as part of the new deal, created jobs for people who were unemployed. what kind of work did people do as part of the ccc? a. built libraries and hospitals b. maintained state and national forests c. photographed migrants and the homeless d. constructed roads and bridges

What did justice brown’s verdict in plessy v. ferguson state?