Which law specifically addresses the accessibility of online content in the EU?

The correct response highlights EN 301 549 as the law specifically addressing the accessibility of online content within the European Union. This standard provides guidelines and requirements for making products and services accessible, which includes digital content, ensuring they are usable by people with disabilities. EN 301 549 aligns with the European Accessibility Act to promote inclusive digital environments and is directly applicable to public sector websites and applications across EU member states, setting a clear framework for compliance and best practices.

The other options do not pertain specifically to the regulation of online content accessibility in the EU. Section 508 of the Rehabilitation Act is a U.S. law focused on federal agency electronic and information technology accessibility. The Americans with Disabilities Act, while it has implications for digital accessibility in the U.S., does not specifically regulate online content in the EU context. The Air Carrier Access Act is concerned with the rights of passengers with disabilities in air travel and does not address online content. Therefore, EN 301 549 stands out as the relevant legislation for accessibility of online content within the EU.