To answer this question, let's go through each option:
Option A) A GUI uses buttons, menus, and icons. - This option is correct because a graphical user interface (GUI) typically includes buttons, menus, and icons as visual elements that allow users to interact with the software or application.
Option B) A GUI should be easy for a user to manipulate. - This option is correct because one of the main objectives of a GUI is to provide a user-friendly interface that is easy to navigate and manipulate.
Option C) A GUI stands for Graphic Use Interaction. - This option is incorrect. GUI stands for Graphical User Interface, not Graphic Use Interaction.
Option D) Both a and b. - This option is correct because both options A and B are true.
Option E) All of the above. - This option is incorrect because option C is not correct.
Therefore, the correct answer is option D. It is correct because a GUI uses buttons, menus, and icons, and it should be easy for a user to manipulate.