A Domain.com technician receives a phone call from a co-worker while working on-site. The call is about a difficult problem that he needs to sort out. What should the technician do?

A.
Politely excuse himself and take the telephone call.

B.
Ask the co-worker to call back later and continue working.

C.
Try and help the co-worker while continuing to work.

D.
Explain to the customer that you have an emergency and take the call.