Final answer:
The ideal mentor for a new graduate nurse is the one who is skillful and takes an active role in teaching and guiding the graduate, helping them to develop their professional skills further.
Step-by-step explanation:
The best mentor for a new graduate nurse would be D. the nurse who is very skillful and often calls the graduate over to teach something new. This nurse not only possesses a high level of expertise, which is essential for a meaningful mentorship, but also shows a willingness to actively contribute to the graduate's professional development. This mentor demonstrates an investment in the new graduate's learning, offering hands-on opportunities to gain knowledge and skills that are crucial to their growth as a healthcare professional.