In the industrial northern cities of the 1920s and 1930s, many black men who had recently emigrated from the South began securing jobs as meatpackers, steelworkers, bricklayers, and carpenters. Identify the reasons why black workers were more attractive to employers.
1) Labor laws applied only to whites.
2) Many unions did not allow black men to join.
3) Black men were highly skilled in these areas as a result of slavery.
4) Compared to whites, black men would work longer hours for less pay.