Which of the following is a true statement?
A. A data model explains what the organization does and what rules govern how work is done in the organization.
B. To construct a data model, you need to know how data are processed.
C. To construct a data model, you need to know when data are processed.
D. A data flow diagram graphically illustrates the structure and relationships among data items.
E. During conceptual data modeling, the preparation of a Network diagram is necessary.
Answer: A