Users are complaining about WLAN performance and the Mist dashboard reports non-Wi-Fi interference. Which diagnostics tool would you use to further investigate ...

Users are complaining about WLAN performance and the Mist dashboard reports non-Wi-Fi interference.
Which diagnostics tool would you use to further investigate this issue on-site and determine the location of the interference?

A. spectrum analyzer B. protocol analyzer C. wireless design software D. WLAN scanner