After a spouse's death, an adult repeatedly says, "I should have recognized what was happening and been more helpful." This adult is experiencing

A) depression.
B) bargaining.
C) anger.
D) guilt.

Guilt

A cognitive or emotional experience that occurs when a person believes they have compromised their own standards of conduct or has violated a moral standard.

Depression

A syndrome related to mental health, distinguished by chronic depressive feelings or a lack of enthusiasm in activities, noticeably hindering everyday functionality.

Bargaining

A stage of grief involving negotiation or compromise to avoid a loss or minimize its impact.