Which keys can be pressed quit without saving in DOS A. Ctrl + A B. Ctrl + B C. Ctrl + C D. Ctrl + D

The correct answer is D. Ctrl + D.

Ctrl + A is used to move the cursor to the beginning of the line.
Ctrl + B is used to move the cursor back one character.
Ctrl + C is used to cancel the current command.
Ctrl + D is used to end the current input and return to the command prompt.

To quit without saving in DOS, you can press Ctrl + D. This will end the current input and return to the command prompt. You will be prompted to save your changes, but if you press Enter, your changes will be discarded.