Answer:
A most likely D least likely
Step-by-step explanation:
a. Tell him that you will be happy to continue talking with him right after you help the other customer/member.
b. Apologize and tell him you see another customer/member that needs your help.
c. In order to keep him happy, allow him to continue his story until he is finished.
d. Interrupt to ask if there's anything you can help him with today.
A because your not ending the conversation, your just letting him know that someone else needs your help for a moment, and that you still care about his story. D because your being rude.