A first level help desk support technician receives a call from a customer and works with the customer to resolve the call for several minutes unsuccessfully. Which of the following should the technician do NEXT?

A.
Continue working with the customer until the problem is resolved.

B.
Explain to the customer that they receive a call back when someone more qualified is available.

C.
Explain to the customer that the problem cannot be resolved and end the call.

D.
Escalate the call to another technician.