You are troubleshooting a mobile device that will not pair with a bluetooth headset. the device was functioning properly with the headset until a recent corporate-wide os update. no other mobile devices in the organization are exhibiting this issue with bluetooth headsets.
which of the following is the first step you will take to resolve this issue?

a. reset the network settings in the mobile device settings app.
b. replace the bluetooth headset with a new pair.
c. update the radio firmware in the mobile device.
d. forget all wi-fi networks on the mobile device.