Given that the current directory is empty， and that the user has read and write permissions， and the following： Which statement is true？（）

A.Compilation fails.

B.The file system has a new empty directory named dir.

C.The file system has a new empty directory named newDir.

D.The file system has a directory named dir， containing a file f1.txt.

E.The file system has a directory named newDir， containing a file f1.txt.