Adata flowchart should be used when you want to illustrate how data flows in a system you want to describe the controls in a program within a system you want to describe physical or resource relationships in a system you want to show how document-flow moves through a system

Option a is the correct answer for the above question.

Explanation:

A DFD (data flow diagram) states about the flow of data for any software. It used to describe the software carefully because of any software process the data only. There are three levels or types for Data flow diagram which represents the flow which are--

0-level,1-level, and 2-level.

Option "a" also states the above-described concept which is the concept of DFD. Hence it is true while the other is not because--