Willow is in violation of her fiduciary duty of:

The choice indicating that Willow is in violation of her fiduciary duty of obedience is correct because a fiduciary duty encompasses acting in the best interests of the client and following their lawful instructions. Obedience requires the fiduciary to comply with all lawful requests made by their client, such as adhering to their preferences regarding property management or sales strategies. If Willow has not followed these instructions, she has failed in her duty of obedience.

In the context of real estate, a breach of obedience could involve ignoring the client's explicit desires regarding the sale of their property or failing to act according to the specific guidance provided by the client. This would undermine the trust placed in her as a fiduciary, highlighting the importance of understanding and implementing client directives effectively in real estate transactions.

While other fiduciary duties such as care, disclosure, and loyalty are also crucial, this particular question focuses on adherence to client instructions, thus making obedience the core issue in this scenario.