Given that the current directory is empty， and that the user has read and write permissions， and the following： Which statement is true？（）
- ACompilation fails.
- BThe file system has a new empty directory named dir.
- CThe file system has a new empty directory named newDir.
- DThe file system has a directory named dir， containing a file f1.txt.
- EThe file system has a directory named newDir， containing a file f1.txt.