State and Local Governments Have Taken on Greater Responsibility for Financing

State and local governments have taken on greater responsibility for financing and operating environmental protection programs utilizing innovative policies. Which of the policies below is one of those?

A) One-quarter of all states requires utilities to use renewable sources for some of their power generation .
B) California mandates the use of water-efficient washing machines.
C) Washington grants homeowners and small businesses tax credits if they install or use solar- or wind-generated electricity.
D) All of these choices.