Which statement about flowcharts is correct?

a.They list internal control activities that are present or missing and are easy to understand and use for identifying control weaknesses in the typical processes.

b. They visually represent the activities in a business process and are used to easily understand the process using standard notations.

c. They show many details of a process in a single diagram that can be used to capture controls via decision points and the manual and automated processes.

d. They are simple diagrams showing the sources of data, processes, and data storage that can be used to focus on the data separate from the who processes data.