With Respect to Taking Medical or Legal Calls in the Office

With respect to taking medical or legal calls in the office on your cellphone,

A) keep your cell phone at hand so you can take the call immediately.
B) take the call, but act as if you are angry because you work is interrupted.
C) advise work associates in advance that you might be receiving such a call.
D) politely tell your work associates to stop talking so you can better hear this important call.