Does the NTSB have any responsibilities beyond investigating aircraft accidents?

The correct answer highlights that the NTSB, in addition to its primary role of investigating aviation accidents, also investigates railroad accidents. This broadens the scope of their responsibilities beyond just aviation and underscores their role in transportation safety as a whole. The NTSB is tasked with determining the probable cause of accidents across various transportation sectors and making recommendations to improve safety.

The NTSB's mandate includes not only aviation-related incidents but also extends to significant accidents involving railroads, which reflects its comprehensive approach to enhancing overall transportation safety. By investigating railroad accidents, the NTSB contributes to understanding safety issues across different modes of transport.

The other options, while they mention functions related to transportation, do not accurately reflect the NTSB’s role. The focus on maritime safety, airline pricing, or the assertion that the NTSB’s activities are limited solely to aviation accidents does not capture the full range of its responsibilities. In short, the NTSB plays a pivotal role in ensuring safety across all major transportation systems, which includes both aviation and railroads.