Which organization does NTSB stand for?

The correct answer is the National Transportation Safety Board. This organization is an independent federal agency of the United States that is responsible for investigating accidents and incidents involving various modes of transportation, including aviation, railroads, highways, pipelines, and marine. Their role is crucial in understanding the causes of accidents and recommending safety improvements to prevent future occurrences. The NTSB conducts thorough investigations and their findings contribute to safer transportation systems.

The other options listed do not correspond to an actual organization or do not fulfill the same functions as the NTSB. Understanding the role of the NTSB is important for anyone working in aviation or transportation safety, as it highlights the significance of accident investigation in improving overall safety standards.