If an Angry Person Calls the Office, What Should the Medical

If an angry person calls the office, what should the medical assistant do or try to do?

A) Interrupt while the caller is talking if the caller says something that is incorrect.
B) Say nothing and let the caller vent.
C) Hang up on the caller after telling him or her to call back when he or she feels calmer.
D) Use a calm voice to ask questions and obtain information about what has angered the caller.