The correct answer is African Americans. Many of them joined the workforce because many came home as veterans from WW1 or didn't come back at all, which meant that people now needed more people to work, so African Americans started working more in various industries and manufacturing plants.
The temperance reformers were part of the temperance movement that was a social movement against the consumption of alcoholic beverages that began in around the 1820s. The preacher Lyman Beecher and the minister and professor of theology John Edgar were one of the temperance reformers.
They became active in the 1820s and 1830s because in that period, after the American revolution when many economic and social problems occurred as a result of rapid inflation, the widespread drinking became a way of life.
