Which of the Following Instances Can Be Attributed to the Hawthorne

Which of the following instances can be attributed to the Hawthorne effect?

A) An organization's efficiency improves after it conducts a thorough job analysis.
B) An organization's efficiency improves after it changes its methods of employee selection and training.
C) Keith's productivity and quality of work increases when he works as part of a team.
D) Alicia's productivity increases when she is told that her performance is being monitoreD.