What enhances the service coverage of Sirius radio?

The correct answer highlights the importance of a repeater network in enhancing the service coverage of Sirius radio. A repeater network consists of strategically placed repeaters that receive the satellite signal and then retransmit it. This system effectively extends the reach of the satellite signals, especially in areas where direct line-of-sight to the satellite may be obstructed by buildings, mountains, or other structures. By expanding the coverage area, the repeater network ensures that users have consistent and reliable access to Sirius radio signals, even in challenging environments. This technology is critical for maintaining high-quality audio streaming and preventing dropouts, thus significantly improving user experience.

In contrast, while multiple antennas might improve reception in specific scenarios, they do not fundamentally expand the service area like a repeater network does. Subscription to additional channels pertains more to content variety rather than coverage enhancement, and larger satellite dishes are typically used for obtaining stronger signals rather than expanding the geographical coverage of the service.