Name the following is a system of rules established by government authorities that requires all emitters to meet strict emissions standards for sources of pollution and requires the use of specific pollution control devices. o a Command-and-control regulation b. Corrective tax o C. Corrective subsidy O d. General theory of second best Which one of the following is a scientific approach to analysis that establishes cause and effect relationships among economic variables? o a. Efficiency criterion b. Normative economics O c. Positive economics O d. Projective techniques