A Nurse Comes to the Unit Manager to Report a Coworker's

A nurse comes to the unit manager to report a coworker's behavioral changes. The nurse has noticed that the coworker's handwriting has become shaky and illegible, that the coworker has mood swings, and that the coworker has had increased tardiness. Which of the following should be the manager's first action?

A) Meet with the coworker in private and discuss the behaviors.
B) Meet with other staff to determine if the coworker has issues at home.
C) Meet with human resources (HR) to determine the best method to terminate the employee's employment.
D) Collect additional information regarding behaviors, absenteeism, or tardiness.