Final answer:
The nurse used the Reflective technique interviewing approach by asking the client what the doctor told them.
Step-by-step explanation:
The interviewing approach the nurse used is Reflective technique. The nurse responded to the client's question by asking them what the doctor told them, which helps the client reflect on the information they have already received. By using this approach, the nurse encourages the client to think about the information they have received from the doctor before forming any conclusions or seeking potential reassurance from the nurse.