The initial screen showing icons for folders, files, and applications.
Option B is correct.
Click the START button and select the program from the menu to open a program when there isn't an icon on the desktop for the one you want to use.
Right clicking will not reveal all the icons, restarting the computer will not create an icon of the program you want to use on the desktop and it is possible to open a program if the icon is not on the desktop. All other options are wrong except option B.