单选题：A file system is ___ .

A file system is ___ .@[D](1)
A. a collection of files
B. directories of files
C. a software package to implement file management
D. files, the software to manage files, and related data structures




A.a collection of files
B.directories of files
C.a software package to implement file management
D.files, the software to manage files, and related data structures


答案：D