Final answer:
Federally-regulated workplaces in the transportation sector focus primarily on regulatory compliance in transit to ensure employee safety and adherence to federal guidelines, despite historical transportation deregulation. The correct option is B.
Step-by-step explanation:
Federally-regulated workplaces that handle the transport of people emphasize primarily regulatory compliance in transit. Such compliance includes adhering to measures that ensure the safety of employees and the public during travel, and abide by federal guidelines for transportation. This could range from the Occupational Safety and Health Administration's (OSHA) standards for workplace safety to the Environmental Protection Agency's (EPA) standards to prevent excessive air pollution from transportation vehicles.
In the historical context, deregulation under President Jimmy Carter significantly changed the landscape of transportation by removing most regulatory shields for aviation, trucking, and railroads, allowing companies to compete with fewer restrictions. However, regulatory compliance in today's transportation sector is still critical in many aspects including sustainability, safety, and maintaining the flow of transport amidst challenges like traffic congestion, pollution, and workplace accidents.
Moreover, human factors psychology research and the development of safety protocols are crucial for activities such as commercial driving or flying - all of which underscores the importance of employee safety during travel and the impact that federal agencies have on individuals' daily commutes, whether on the road or through public transportation.
Hence, Option B is correct.