Answer:
B
Explanation:
Determining how the user could interact with the app varies person to person, the others are essential to creating apps though.
B, it’s when the supply and demand are equal
C. Provides an interface between user and OS.
The GUI, or Graphical User Interface, is just about everything you generally see with a common computer or smartphone. You rarely run an application or program from the command itself, as clicking an icon in the GUI runs the software for you.
