Correct Answer : Option (D) : Ivan Sutherland
Explanation : The first Virtual Reality(VR) Head-Mounted Display (HMD) system, The Sword of Damocles, was invented in 1968 by computer scientist Ivan Sutherland and his student Bob Sproull.
Correct Answer : Option (A) : The viewer should be in a central location and movement be limited.
Correct Answer : Option (D) : To create an Environment of scenes or objects of real appearance