All of the Following Statements Concerning the Use of an Electrical

All of the following statements concerning the use of an electrical schematic are true EXCEPT :

A) an electrical schematic can aid a technician in understanding how a system is designed to operate.
B) an electrical schematic is designed to be used only by automotive engineers and should never be used by an automotive field technician.
C) an electrical schematic can show circuit components, powers, grounds, computer input circuits, computer output circuits, and multiplexing data busses.
D) an electrical schematic can be used with a flow chart to maximize the technician's diagnostic potential.