How do you configure the list report in order to create the pie chart?

You have been asked to create a pie chart that shows the number of cases each manager has created. A list report contains columns for manager name, case ID, and office.

How do you configure the list report in order to create the pie chart?
A . Summarize the manager name column.
B . Group the manager name column.
C . Group the case ID column.
D . Summarize the case ID column.

Answer: D