Which organization is responsible for addressing bio-terrorism in the United States?

The correct choice is the Centers for Disease Control and Prevention (CDC), as this organization plays a crucial role in monitoring and controlling disease outbreaks, including those that might stem from bio-terrorism. The CDC is tasked with preventing the spread of infectious diseases and has comprehensive resources and expertise to assess, respond to, and manage biological threats. They conduct surveillance, research, and provide guidance to local and state health agencies to effectively handle public health emergencies, including potential bioterrorism events.

In situations involving bio-terrorism, the CDC collaborates with other federal agencies, including the FBI, EPA, and Homeland Security, but its primary focus is on the health aspects, epidemiological responses, and public safety measures relevant to biological incidents. The other organizations have specific roles in this context: the FBI focuses on investigation and law enforcement; the EPA oversees environmental impacts; and the Department of Homeland Security coordinates broader security responses, but the health-related response is primarily under the jurisdiction of the CDC.