Why the other options are wrong:

• options for reading glasses.: Reading glasses are not discussed; the account concerns a computer input device.
• the evolution of the computer keyboard.: The prototype and patent described belong to the mouse, not the keyboard.
• a ten-year history of computing.: The account gives mouse-development milestones, not a ten-year history of computing.

Correct Answer: 1964.

Why this is correct: The report dates English's first mouse prototype to 1964. The earlier date, 1962, belongs to Engelbart's framework report rather than the prototype.

Why the other options are wrong:

• 1960.: The passage places the beginnings in the 1960s, but the specific prototype year is 1964, not 1960.
• 1962.: The year 1962 is when Engelbart published the conceptual framework. The prototype came two years later.
• 1988.: The report does not date the first prototype to 1988; it explicitly gives 1964.

Correct Answer: Mother of All Demos.

Why this is correct: The report says Engelbart's 90-minute public demonstration was dubbed the mother of all demos. This is the reported nickname of the demonstration.

Why the other options are wrong:

• the best demo of all time.: The best demo of all time is a statement of praise, but it is not the nickname the report gives.
• the big daddy of demos.: The big daddy of demos is a different nickname from the one stated in the report.
• a demo worth its salt.: A demo worth its salt is not the reported name. The passage specifically uses mother of all demos.

Correct Answer: carved wooden casing.

Why this is correct: The first prototype is described as having a carved wooden casing. The question asks about that casing, so the material and construction must both match.

Why the other options are wrong:

• metallic body.: The casing was made of carved wood, not metal.
• plastic body and rubber roller.: The report does not describe a plastic body and rubber roller; it describes a wooden casing containing wheels.
• gold plated case.: A gold-plated case is not described. The stated casing material is wood.

Correct Answer: space for only one button.

Why this is correct: The report explicitly says there was space for only one button on the first mouse. That rules out answers describing several buttons.

Why the other options are wrong:

• three buttons with limited usability.: Three buttons conflicts with the stated space for only one button.
• no roller but a fixed mechanism.: The prototype used a wheel or wheels to turn mouse movement into cursor movement. It was not described as a fixed mechanism with no roller.
• five buttons with various tasks.: Five buttons conflicts with the stated limit of one button.