The <span>element located on the top left of the Word screen is the Quick Access Toolbar. </span>On the quick access toolbar, you can find some of the common functions that you will need to use on a regular basis, it contains commands that are used most often, for example Redo, Undo and Save etc.
A bus is an electrical path which data travels between the different components in an electronic device.
The correct answer is option D, the last one! <3