In Muller v. Oregon, the Supreme Court upheld the principle promoted by progressives like Florence Kelley and Louis Brandeis that
a. child labor under the age of fourteen should be prohibited.
b. the federal government should regulate occupational safety and health.
c. factory labor should be limited to ten hours a day five days a week.
d. female workers should receive equal pay for equal work.
e. female workers required special rules and protection on the job.
Answer: E