Which responsibility is included in the Food and Drug Administration's role?

The Food and Drug Administration (FDA) plays a critical role in ensuring the safety and proper regulation of food products, particularly when it comes to interstate commerce. The responsibility of regulating food transported across state lines falls squarely within the FDA's jurisdiction, as they are tasked with enforcing laws that govern how food is produced, processed, and distributed to ensure that it meets safety standards. This regulation is vital to prevent foodborne illnesses and protect public health.

In the context of the other responsibilities, while the FDA does have a role in investigating foodborne illnesses, this is more of a response activity rather than a primary regulatory function. Inspecting all food processing plants is generally the responsibility of the FDA but is not comprehensive because state and local agencies also conduct inspections. Setting food pricing standards is not within the scope of the FDA’s responsibilities; pricing is influenced by market forces and is not regulated by the FDA. Thus, the option regarding the regulation of food transported across state lines accurately reflects a significant function of the FDA in maintaining food safety nationally.