What is the reason for the lower Comp Factor?

An EMC Data Domain administrator is analyzing file system usage. While studying the Space Usage Graph the administrator finds out that the Comp Factor has decreased over the last two months.

What is the reason for the lower Comp Factor?
A . Capacity and quota alerts were configured at the MTree level
B . Cleaning frequency has been decreased
C . A significant amount of video content was added to the system
D . Cleaning frequency has been increased

Answer: C