Final answer:
Donald's work-driven behavior, constant engagement with work communications, and short breaks suggest he is a Type A personality, which is characterized by being highly driven and having a strong sense of urgency.
Step-by-step explanation:
Based on the description, Donald exhibits characteristics of being intensely driven, with a strong focus on work and a tendency to be preoccupied with deadlines and time management. These traits align with what Friedman and Rosenman describe as a Type A personality.
Type A individuals are typically high-energy, work-oriented, and have a sense of urgency about their tasks. Unlike their Type B counterparts, who are more relaxed and easy-going, Type A individuals, such as Donald, often work long hours, are heavily involved with their electronic devices for work-related purposes, and take brief breaks. This constant drive and inability to relax can contribute to stress-related health issues, as found by Friedman and Rosenman in their research indicating a higher frequency of heart disease among Type As. Therefore, Donald is a c) type A personality.