Lucas, an employee at an insurance company, is going through a divorce. His divorce has affected his performance at work. He is often tardy, mentally absent$,$ and lacks interest. His supervisor wants to uncover the underlying cause of Lucas's poor performance. In addressing this issue, his supervisor should

reduce his job responsibilities.

manage the situation with discipline and counseling.

apply the principles of motivation.

adjust his appraisal ratings to be fair to him.