Answer:
(D). Report the threat to Gregor's boss and law enforcement officials.
Explanation:
Gregor, a night watchman, was encouraged by his wife to enter treatment for his depression. During the initial session, he revealed great anger and resentment toward his boss, who blocked a raise for him. He perceived this as causing great financial hardship for his family and vowed to "snuff" the boss. Gregor's psychologist took this threat seriously and was obligated to "Report the threat to Gregor's boss and law enforcement officials".
Gregor was facing depression and is taking treatments, probably because of his mental illness, he was angry with his boss, because the boss refused to support him financially and Gregor feels that's what's causing the financial hardship in his family, because of all this he threaten to snuff the boss, because he feels like the boss is being inconsiderate and wicked.
Gregor's psychologist had to report to Gregor's boss and law enforcement officials at this stage because Gregor might actually go ahead with his plan.
With Gregor's psychologist reporting Gregor's threat and plans, certain actions would be made to ensure Gregor doesn't go ahead to accomplish his threats/plan.