Which of the following statements about a system approach is/are true?
A. A systems approach to decision making emphasizes the interrelationship between different subsystems of the organization.
B. A systems approach to decision making assumes that the whole is greater than the sum of its (subsystem) parts.
C. A systems approach to decision making assumes that the whole is equal to the sum of its (subsystem) parts.
D. A systems approach to decision making assumes that a system consists of unrelated subsystems.