E2C04:Which of the following frequencies can be used for amateur radio mesh networks?
Direct answer summary (2024-2028 NCVEC pool)
The official correct answer for E2C04 is Frequencies shared with various unlicensed wireless data services.
The key fact is Frequencies shared with various unlicensed wireless data services. Match that fact to the exact condition in the question; the other choices describe a different rule, band, component, or operating situation.