Final answer:
The NTSB cannot rule FAA regulations invalid; it investigates accidents and recommends safety measures, while the FAA regulates civil aviation.
Step-by-step explanation:
The NTSB (National Transportation Safety Board) does not have the authority to rule that a particular FAA (Federal Aviation Administration) regulation is invalid. Rather, the NTSB is an independent federal agency that investigates civil transportation accidents, including aviation accidents, and recommends safety standards to prevent future accidents.
The FAA, on the other hand, is responsible for regulating all aspects of civil aviation in the United States. If the NTSB finds issues with aviation safety, it can recommend changes, but the FAA has the ultimate authority to adopt new regulations or amend existing ones.
Answer to the provided question: B. False.