Carly Jackson is a staff auditor for a public accounting firm. She has been asked to document the client's existing accounting information system so the engagement team will assess the clients adequacy of controls and financial reporting. She decides to begin by creating flowchart to describe, analyze, and evaluate internal controls. What documentation tool should she use for this purpose?

a. system flowchart

b. internal control flowchart

c. document flowchart

d. dataflow diagram