Several years after his wife's death, Mr. Waldorf remains incapacitated by feelings of guilt and sadness. To reduce Mr. Waldorf's depression, a therapist is actively encouraging him to stop blaming himself for not being able to prevent his wife's death. The therapist's approach is most representative of:

Cognitive therapy

Explanation:

Cognitive therapy is a type of psychotherapy which was propounded by an American psychiatrist Aaron T. Beck.

He propounded it based on the concept which says that the way we think about things affects how we feel emotionally. Cognitive therapy mainly deals with present thinking, behavior, and communication rather than on past experiences.

Cognitive-behavioral therapy also focuses on changing the automatic negative thoughts that can contribute to and worsen a person’s health.