A. We use the mouse today because it is the pointing device that is easiest to use compared to others such as joysticks, trackballs etc.
B. Doug Engelbart was bored at a conference and started thinking about tracking movement of a plane using two sets of wheels moving in orthogonal directions.
C. Doug Engelbart remembered these notes when he was trying to come up with a device to select objects on a computer screen.
D. Doug Engelbart tells the story of how he invented the mouse.
Choose the correct answer from the options given below:
Correct Answer: (4) D, B, C, A
