The correct answer is A) 1974.
Graphical user interfaces (GUIs) was pioneered in 1974.
The company Xerox PARC was the first to pioneer with graphical user interfaces. This company was the first to create the Xerox a personal computercalled "Alto." It was the first with a graphical user interface. Although it was not sold to the public, it was used in the corporate headquarters by many employees.
