Final answer:
The Physical Data Flow Diagram (D) is the type that details where, how, and by whom a system's processes are performed, distinguishing it from other types of diagrams by its focus on physical aspects of system processes. So, the best answer is d, Physical Data Flow Diagram
Step-by-step explanation:
The type of data flow diagram that specifies where, how, and by whom a system's processes are performed is the Physical Data Flow Diagram (D).
Unlike the other types of diagrams listed, the Physical Data Flow Diagram focuses on the concrete aspects of the system's processes, showcasing the physical relationships and flows between tasks, departments, people, or other entities involved in the operation of the system.
Other types of diagrams such as the Context Diagram (A) and Level 0 Diagram (B) provide a more high-level overview without delving into the specifics of the physical layout or who is responsible for each process.
The Detailed Data Flow Diagram (C) provides a more in-depth look at the system's processes, but it still does not specify the physical aspects as much as the Physical Data Flow Diagram does.
o, the best answer is d, Physical Data Flow Diagram