The correct answer is A. FORMAT command.
The FORMAT command is used to prepare a disk for use. It divides the surface of the disk into sectors and assigns a unique address to each one. It also creates a file system on the disk, which is
a way of organizing the data on the disk.The FAT command is used to manage the file allocation table (FAT), which is a table that keeps track of where files are stored on a disk.
The VER command is used to display the version number of MS-DOS.
The CHKDSK command is used to check the disk for errors and fix them if necessary.
E is not the correct answer because it is not a valid command.