What additional range can an NDB receive besides its own frequency?

The correct answer highlights that an NDB (Non-Directional Beacon) is primarily designed to operate within a specific frequency range, typically in the medium frequency band, which overlaps with commercial AM radio frequencies. Therefore, an NDB can receive signals that may occur in that range, including those from commercial AM radio stations. This is an important aspect of an NDB's functionality, as it allows pilots to use these signals for navigation and direction finding, especially when they are in proximity to established AM broadcast stations.

In contrast, the other options, such as commercial FM radio, satellite signals, and television broadcasts, operate on different frequency ranges. FM radio stations typically operate in the VHF band, which is not utilized by NDBs. Satellite signals operate at much higher frequency bands, often in the GHz range, and television broadcasts also fall within the VHF/UHF range. Therefore, these signals are not compatible with the capabilities of an NDB to receive, making AM radio the most valid additional range for an NDB.