Final answer:
The nurse is upholding the ethical principle of autonomy by supporting the client's decision to consult a different surgeon, highlighting the client's right to make independent health care decisions.
Step-by-step explanation:
The nurse supports the client's decision to consult with a different surgeon, utilizing the ethical principle of autonomy. This principle acknowledges that patients have the right to exercise agency or self-determination when making decisions concerning their health care. By supporting the client's action, the nurse is respecting the client's right to make informed choices about their treatment options and to seek second opinions if they wish.