Which of the following is an example of a distressing stressor?

A distressing stressor is a type of stressor that typically leads to negative feelings, anxiety, or harm to one’s well-being. In this case, divorce serves as a clear example of a distressing stressor because it often involves significant emotional upheaval and disruption in an individual's life. The process can lead to feelings of loss, sadness, and instability, making it a source of considerable stress.

In contrast, the other options represent significant life events that, while they can be stressful, are generally associated with positive outcomes or excitement. A promotion is typically viewed as a positive advancement in one's career; a wedding is a celebration of love and commitment, often seen as a joyful occasion; and graduation is a milestone achievement marking the completion of an academic journey, associated with pride and future opportunities. These events may bring about stress due to their demands, but they are generally not distressing in the same way that divorce is.