The correct answer is: B. RESTORE A: ./M
The RESTORE command is used to restore files from a backup. The syntax for the RESTORE command is:
RESTORE source destination [/switches]
The source is the drive or directory that contains the backup files. The destination is the drive or directory where you want to restore the files. The switches are optional parameters that control how the RESTORE command works.
The /M switch specifies that you want to restore only those files that have been modified since the last backup.
For example, to restore all files from the backup on drive A to the current directory, you would use the following command:
RESTORE A: ./M
To restore only those files that have been modified since the last backup, you would use the following command:
RESTORE A: ./M
The other options are incorrect because they do not specify that you want to restore only those files that have been modified since the last backup.