A server crashed because it ran out of all free available disk space. After booting the server backup it is noticed that enhanced logging was enabled on the web server software months before. 
Which of the following is MOST likely causing the disk to run out of space？ （）

A. The web server requires larger disk drives.
B. Traffic to the web server has increased.
C. Disks are not large enough for the web server software.
D. Log files are filling the disk.