Which of the following would be considered a step(s) to locate a skip?

A) ?Place a telephone call to see whether the old phone number was transferred to a new address.
B) Call referring individuals to try to obtain a new address for the patient, although you must not indicate your reason for needing the new address other than that you need to verify it.
C) Use the Internet as a tool to locate a skip patient.
D) All of the above

D