The correct answer is C. Different icons are used depending on whether the bin is empty.
The recycle bin icon is always visible in your desktop not only when you delete something; therefore, the answer A is incorrect. Also, when you right-click the icon it displays a menu in which you can choose if you want to delete its contents, so answer B is incorrect as well. Finally, even tough you can pin the recycle bin icon to your task bar, it is not its default location; its default location is your desktop; therefore, answer D is also incorrect.
