Final answer:
Nurse 1 is demonstrating the qualities necessary for a nurse manager by taking initiative to research and suggest ways to protect patients against increased infection rates following cardiac surgery.
Step-by-step explanation:
The nurse who is demonstrating the qualities necessary for a manager is nurse 1, who becomes aware of increased infection rates following cardiac surgery and takes it upon herself to research the possible causes and prevention measures. This nurse shows initiative, efficiency, and organizational skills by proactively seeking solutions to protect patients.