Should You Have to Take a Cellphone Call While Interacting

Should you have to take a cellphone call while interacting with a work associate, it is recommended that you

A) take the call on the spot to avoid wasting time.
B) move about fifteen feet (five metres) away to take the call.
C) Use the speakerphone function so your work associate will understand the importance of the call.
D) invite your work associate to speak to the caller.