Which of the following is a responsibility of the Drug Enforcement Administration (DEA)?

The role of the Drug Enforcement Administration (DEA) primarily revolves around controlling drug trafficking. This includes enforcing the controlled substances laws and regulations of the United States, as well as addressing the illegal drug trade, which encompasses the manufacturing, distribution, and possession of controlled substances. The DEA works to prevent drug abuse and trafficking by conducting investigations, collaborating with other law enforcement agencies, and establishing programs that focus on drug prevention and treatment.

The other options pertain to different regulatory areas. For example, regulating environmental standards typically falls under the purview of the Environmental Protection Agency (EPA), while food safety is mainly the responsibility of the Food and Drug Administration (FDA) and the Department of Agriculture. Clinical trials are managed by various health agencies, often involving protocols regulated by the FDA, rather than the DEA. Each agency has its specific focus and jurisdiction, making the DEA a key player in the fight against drug-related issues.