A nurse is talking with a patient, and 5 minutes remain in the session. This patient has been silent ...

A nurse is talking with a patient, and 5 minutes remain in the session. This patient has been silent most of the session. Another patient interrupts and says to the nurse, I really need to talk to you. The nurse should:
 
  a. invite the interrupting patient to join the session with the current patient.
  b. tell the interrupting patient, This session is 5 more minutes, then I will talk with you.
  c. say to the interrupting patient, I am not available to talk with you at the present time.
  d. end the unproductive session with the current patient. Spend time with the next patient.