How does the information in the chart reflect the changes in American labor? 



Select one:

a. Before the 1940s, unions did not admit women, African Americans, or other minority workers.

b. Until the late 1930s, unions were only present in the industrialized Northeast.

c. During World War II, the federal government required employers to accept unions.

d. Prior to World War II, the only unions that existed were restricted to skilled laborers.