Tom, One of Pino's Employees, Is Failing to Perform to Standard

Tom, one of Pino's employees, is failing to perform to standard. Pino wants to use progressive discipline to change Tom's behavior. What should Pino do the next time he observes Tom's failure to perform?

A) Put a written record of the incident in Tom's personnel file.
B) Tell Tom's superior.
C) Ask the human resources department for help.
D) Give Tom a verbal warning.
E) Write a negative performance appraisal of Tom.