How should a consultant configure a report that shows the average number of days that Cases stay open?

How should a consultant configure a report that shows the average number of days that Cases stay open?
A . Create a formula field on Case to calculate the average age.
B . Create a report snapshot of the number of open Cases each day.
C . Use the standard Case age field on the resort.

Answer: A

Explanation:

To report the average number of days that Cases stay open, creating a formula field on the Case object to calculate the age of each case is effective. This formula can calculate the difference between the case creation date and the current date (for open cases) or the closed date (for closed cases). A report can then aggregate this data to calculate the average age of cases, providing insights into case resolution times.