Which Best Describes the Recent History of Energy Policymaking in the United

Which best describes the recent history of energy policymaking in the United States?

A) not much activity until the mid-1980s followed by a period of significant policymaking activity that continues today
B) policy stalemate from the 1970s through the 2000s
C) period of incremental policy change followed by numerous significant policies enacted in the 1990s
D) period of incremental policy change followed by high level of regulation