Which option must be selected to view all available wireless frequencies supported by the card during a scan?

To view all available wireless frequencies supported by the card during a scan, selecting the "superchannel" option is essential. The superchannel feature enables the wireless device to operate outside of the regulatory restrictions imposed by the standard channels. It allows the device to scan and utilize a wider range of frequencies, which includes channels that may not be authorized for general use in certain regulatory domains.

By activating superchannel, the device can access frequencies that might otherwise be restricted or unavailable, thus providing a comprehensive view of all the potential channels that the wireless hardware can support. This is particularly useful in scenarios where finding the best channel for performance or avoiding interference is crucial.

In contrast, options like regulatory domain restrict the device to operate within specific frequencies based on the regulations of the country, limiting the scan to channels that are compliant with local laws. Manual txpower pertains to setting the transmission power manually and does not relate to scanning frequencies. Automatic channel selection assists in choosing the optimal channel based on current conditions but does not inherently expand the frequency options available for scanning.