The correct answer is C. DOS 6.2.
DOS 6.2 is a discontinued operating system that was released in
1993. It was the last version of DOS to be widely used. DOS 6.2 did not support long file names, which are file names that are longer than 8 characters. This limitation was due to the way that DOS stored file names in the file system.OS/2 is a discontinued operating system that was developed jointly by IBM and Microsoft. It was released in 1987 and was designed to be a replacement for DOS. OS/2 supported long file names from its inception.
Windows 98 is a discontinued operating system that was released in 1998. It was the successor to Windows 95. Windows 98 supported long file names.
Windows NT is a discontinued operating system that was released in 1993. It was designed to be a more powerful and stable operating system than DOS and Windows 95. Windows NT supported long file names.