The maximum length of a DOS command is 127 characters. This includes the command itself, any parameters, and any switches. If you try to enter a command that is longer than 127 characters, you will receive an error message.
Option A is incorrect because the maximum length of a DOS command is 127 characters, not 80 characters.
Option B is correct because the maximum length of a DOS command is 127 characters.
Option C is incorrect because the maximum length of a DOS command is 127 characters, not 100 characters.
Option D is incorrect because the maximum length of a DOS command is 127 characters, not 8 characters.