Which of the Following Statements A), B) or C) Is

Which of the following statements a) , b) or c) is false?

A) Operating systems typically can prevent more than one program from manipulating a file at once.
B) When a program finishes processing a file, the program immediately should close it to release the resource. This enables other programs to use the file (if they're allowed to access it) .
C) Closing a file creates a resource leak in which the file resource is not available to other programs.
D) All of the above statements are true.