An ICU Nurse Manager States, "The Hospital Has a Union

An ICU nurse manager states, "The hospital has a union but I wouldn't advise joining," to a newly hired nurse. The human resources (HR) director is informed of this comment. How should the HR director respond?

A) Call the new nurse and explain that joining the union is encouraged by the hospital.
B) Remind the manager that there is to be no interference with an employee's decision to join the union.
C) File a grievance against the manager.
D) Terminate the manager.