More Than 70 Percent of the Physicians in the Maricopa

More than 70 percent of the physicians in the Maricopa County (Arizona) Medical Society agreed to establish a maximum fee schedule for health services to curb rising medical costs. All physicians were required to adhere to this schedule as a condition for membership in the society. The U.S. Supreme Court ruled that this agreement violated the Sherman Act and represented price fixing. This example illustrates that the physicians' actions were

A) ethical but illegal.
B) ethical and legal.
C) unethical and illegal.
D) unethical but legal.
E) altruistic but naïve.