Which category of EAS expands basic service?

• A. Basic EAS
• B. Enhanced EAS
• C. Core EAS
• D. Supplemental EAS

Answer: (B)

Expanding basic service means adding capabilities beyond the foundational alerting functions. Enhanced EAS is designed to broaden what the basic system can do—more alerting channels, wider geographic reach, faster and more reliable dissemination, and better coordination with other alerting methods. The term “enhanced” signals this upgrade over the baseline. The other categories denote different roles or levels that don’t specifically connote expanding the base services, so they don’t fit as well.