A company has a strict policy against unauthorized recording of conversations during confidential meetings. To adhere to this policy when using mobile devices issued to employees, which of the following is the BEST solution to prevent unauthorized use of the microphone during these meetings?
Geofencing to disable microphones in secure areas
Installing a mobile antivirus with audio protection features
Disallow all applications from requesting microphone access
Physical removal of the microphone from mobile devices
Mandatory use of headphones without a built-in microphone