Final answer:
Peter, as a Type A personality, is more prone to heart disease, a psychosomatic disorder associated with Type A characteristics such as competitiveness, impatience, and hostility. The correct option is D.
Step-by-step explanation:
As a Type A personality, Peter would be unusually prone to a psychosomatic disorder, such as heart disease.
Research conducted by Friedman and Rosenman has shown a significant correlation between Type A behavior, characterized by an intensive work ethic, preoccupation with deadlines, and a tendency to be in a rush, and an increased risk of heart disease.
Type A individuals are often competitive, have a sense of urgency about time, are impatient, and can display hostility, especially towards those who might interfere with their work. These characteristics contribute to stress, which is a known risk factor for heart disease.
Over time, studies have continued to support this link, with findings that elements like suppressed hostility and anger are predictive of an increased risk of heart disease. Jeffrey, an example of a person with Type A behavior, experienced a heart attack at the age of 52, illustrating the real-world consequences of this personality type on health. The correct option is D.