The correct answer is (c). The Energy Conservation Act became effective in 2006.
The Energy Conservation Act is a United States federal law that was enacted in 2006. The law was designed to improve energy efficiency in the United States by setting energy efficiency standards for appliances and other products. The law also established a program to provide financial assistance to states and local governments to help them implement energy efficiency programs.
The Energy Conservation Act has been successful in reducing energy consumption in the United States. According to the U.S. Department of Energy, the law has saved consumers an estimated $1.3 trillion in energy costs since it was enacted. The law has also helped to reduce greenhouse gas emissions by an estimated 2.5 billion metric tons.
The Energy Conservation Act is an important piece of legislation that has helped to improve energy efficiency in the United States. The law has saved consumers money, reduced greenhouse gas emissions, and helped to create jobs in the energy efficiency sector.
The other options are incorrect. Option (a) is incorrect because the Energy Conservation Act was not enacted in 2001. Option (b) is incorrect because the Energy Conservation Act was not enacted in 2002. Option (d) is incorrect because the Energy Conservation Act was not enacted in 2011.