Which of the following should a technician do FIRST after receiving a call from a customer asking for assistance?

Which of the following should a technician do FIRST after receiving a call from a customer
asking for assistance?

A.
Confirm the user and the associated issue.

B.
Confirm the hardware make, model, and serial number.

C.
Escalate the call to a supervisor.

D.
Assign the appropriate status for the problem.