While deleting all files beginning with the letter a there was still the file Access.txt left. Assuming that it had the correct ownership, why was it not deleted?
A. Files with extensions need a different treatment.
B. rm had to be called with the option -R to delete all files.
C. The file Access.txt was probably opened by another application.
D. The file Access.txt was hidden.
E. Linux file names are case sensitive.