Which regulatory agencies codify Good Laboratory Practices (GLP) for laboratory studies?

The correct answer is grounded in the roles that various regulatory agencies play in setting standards for laboratory practices, particularly in ensuring quality and integrity of research conducted on non-clinical studies. The FDA (Food and Drug Administration) establishes guidelines for the safety and efficacy of drugs, ensuring that laboratory practices meet consistent regulatory standards. The EPA (Environmental Protection Agency) oversees studies related to environmental effects, requiring that laboratory work adheres to GLP to ensure the reliability of environmental data. Lastly, the OECD (Organisation for Economic Co-operation and Development) provides an international framework that promotes the systematic adoption of GLP across member countries, enhancing the credibility of laboratory studies throughout the world.

In this context, while other agencies listed in the other choices may have regulatory responsibilities in specific areas, they do not codify GLP in the comprehensive manner addressed in the question. Therefore, the collaboration of the FDA, EPA, and OECD represents the correct regulatory agencies governing Good Laboratory Practices.