Chas Mulligan Has Been Hired by Yardley Security as an Assistant

Chas Mulligan has been hired by Yardley Security as an assistant to the internal auditor.He has been asked to thoroughly document the existing accounting information system in preparation for making recommendations for improvements.He decides to begin by meeting with the information technology staff in order to develop an understanding of the computer programs used by the system.The documentation tool that he should employ for this purpose is a

A) data flow diagram.
B) document flowchart.
C) system flowchart.
D) program flowchart.