R2 stands for Responsible Recycling and is a standard specifically created for the electronics recycling industry by Sustainable Electronics Recycling International (SERI). Hence, option (a) is the correct answer. SERI is the housing body and ANSI-accredited Standards Development Organization for the R2 Standard: Responsible Recycling Practices for Use in Accredited Certifications Programs. Stakeholders who contributed to the creation of these standards include the U.S. Environmental Protection Agency (the EPA was responsible for a study of the implementation of the R2 standards); regulators from state agencies; electronics recyclers, refurbishers, and their trade associations; OEMs/customers of electronics recycling services; and non-governmental organizations.