Read this excerpt from "how the internet and other technologies came about."

the pentagon wanted to ensure that their pilots would be able to fly their jets and bombers in the most unpredictable, hostile environments, including the presence of huge winds whipped up by nuclear fireballs. to accomplish this, the pentagon developed flight simulators, in what was the birth of virtual reality. the pilots would sit in chairs with goggles placed over their eyes and use joysticks to control the simulated computer image in their headset.

select the most accurate summary of kaku’s argument.
virtual reality allows people to experience harsh environments, such as nuclear warfare, in a safe location.
virtual reality began as a pentagon-generated tool that prepared jet pilots for nuclear war.
virtual reality has impressive gadgetry, such as joysticks and headsets, that were inspired by the pentagon.
virtual reality is an indispensable tool that prepares pilots for the shock of nuclear fireballs.

The correct answer is: Virtual reality began as a Pentagon-generated tool that prepared jet pilots for nuclear war.

Kaku is trying to illustrate the origin of the Internet and other technologies, in this case, virtual reality.  He guides us through a very interesting story about how virtual reality came about out of the necessity of preparing pilots for harsh conditions without putting them in danger during the nuclear war. It is not talking about the functions of virtual reality or its importance, this specific extract is speaking about its origin and that is why the second option is the correct answer.

1. ford: gerald ford´s presidency, from 1974 to 1977, faced high inflation, named it public enemy nº1, and created the win program (whip inflation now).

2. carter: president from 1977 to 1981, carter had controversial poitions over abortion, but yet, he enforce the roe vs wade decision, which had pro-choice content.

3. reagan. for his eloquency and powerful speeches in his mandates, from 1981 to 1989, reagan earned this nickname, “the great communicator” .

4. george h w bush: despite many presidents had important roles in managing and trying to end the cold war, it was in bush sr's mandate that the berlin wall was materially destroyed, and he was visited by gorbachev in the uspresident from 1989 to 1993.

5. clinton: defense of marriage act. clinton signed this controvesial act, which defined marriage and spouses in strict heterosexual perspective, that was later declard unconstitutional by the us supreme court.

6. george w bush: in the begining of his presidency, which lasted until 2009, bush jr faced the greatest terrorist attacks in us and probably the worlds history, in september, 11 of 2001.

7. obama: in attempts to cease a great economical crisis, barack obama signed the controversial recovery act in february 2009, which handled 780-billion dollars.

the answer is b. hope this