How do you configure the report definition?

A purchase request list report includes columns for case ID and regional cost center. A manager wants the report to show the total number of purchase requests for each of the regional cost centers.

How do you configure the report definition?
A . Summarize the regional cost centers by count.
B . Create a filter for each cost center and count the case IDs.
C . Summarize the case ID column by count.
D . Define a function for the cost center column to total the case IDs.

Answer: C