You have been assigned a disk quota of 50 MB. You are already using 42 MB and you'd like to store a 9 MB text file in your folder. You use file compression to shrink the text file to 6 MB, but when you try to copy it into your folder, you can't. What is the most likely cause of the failure?

a. The file has been corrupted during the compression process.

b. There has been a disk failure on the file server.

c. You have exceeded your 50 MB quota.

d. You have renamed the file after it is compressed.