Which organization enforces regulations related to air carrier access?

The Federal Aviation Administration (FAA) is the correct answer because it is the key agency responsible for regulating all aspects of civil aviation in the United States, including air carrier access rules that ensure compliance with safety and operational standards. The FAA establishes policies and regulations aimed at maintaining safe air travel, which includes considerations for passenger access and support for all passengers, including those with disabilities.

In contrast, the Centers for Disease Control and Prevention (CDC) primarily focuses on public health and safety measures, particularly in relation to communicable diseases, rather than the enforcement of air carrier access regulations. The National Transportation Safety Board (NTSB) plays a vital role in investigating transportation accidents and making recommendations for safety improvements but does not enforce regulations regarding air carrier access. The International Air Transport Association (IATA) is a trade association representing airlines but does not have regulatory authority over air carrier operations or access compliance.