单选题：To prevent unauthorized users’access to files, which of followi

To prevent unauthorized users’access to files, which of following solution is provided by operating system to ensure that only the users authorized by the file owner can access files? @[A](1)
A. file protection
B. file secrecy
C. file transform
D. file share




A.file protection
B.file secrecy
C.file transform
D.file share


答案：A