TOEFL Listening: ETS-TOEFL听力机经 - VPQX17J94W81GK14P$

What does the professor imply about the Environmental Protection Agency? A. It compensated employees for the negative effects of working with acid B. Its regulations contributed to the high cost of acid-washed jeans C. It was unable to clean much of the water polluted by stones and acid D. It developed the hio-stone technology in order to protect the environment