TOEFL Listening: ETS-TOEFL听力机经 - CA0C8JTES817T334P$

According to the professor, what factors led to a change in Supreme Court rulings in the 1930s? A. A court case that threatened to close several factories. B. A national economy that had become highly interconnected. C. An inability of states to support residents in need of help. D. A concern that states were failing to regulate industry.