By 1920, the U.S. Census Bureau reported that for the first time
a. more people lived in urban areas than in non-urban (rural) areas.
b. less than 2 percent of Americans made their living from farming.
c. in America's cities, more children were attending school than were working in factories.
d. America no longer had a real frontier. e. there were more foreign-born than American-born people in the United States.