In the US, the Command-And-Control Environmental Laws of the Early 1970s, Together

Multiple Choice

In the U.S., the command-and-control environmental laws of the early 1970s, together with the ensuing amendments and updates that have been made to them over time,

A) were necessary as US industries had zero incentive to control pollution.
B) were an inexpensive incentive for industrial polluters to improve performance.
C) are given considerable credit for cleaner air and water in recent decades.
D) draws distinctions between the needs of firms and costly equipment upgrades.