Which Statement Is False

Which statement is false?

A) Nearly all economists prefer incentive-based regulations to command-and-control regulations to curb pollution.
B) Emissions trading originated as a result of the 1990 Amendments to the Clean Air Act.
C) In most other economically advanced countries,gasoline taxes are much higher compared to the United States.
D) Since the passage of the Clean Air Act in 1972,there has been very little improvement in air quality in the United States.