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14

Inventions and

The first electronic computers were built in the 1940s and 1950s. In the 1960s, the US Department of Defense developed the ARPANET the first network to connect computers. People began to buy personal computers in the 1970s. Internet service was available by the 1980s, although a computer could only send email to another computer that had the same ISP, or Internet Service Provider. The development of the World Wide Web in the 1990s allowed easy universal access to computers around the word.

1940-1950d electronic computers

1960: ARPANET

↑

1970x first personal computers

1980 email to some ISP

1990: World Wide Web

2. The sequence chain above shows the development of the freemet wher can you conclude from the amount of time shown on the sequence cha

(A) Development happened quickly

Only scientists wanted to use the Internet

People were satisfied with the first email technology

Email was created after the World Wide Web wat d

68

Unit 2

BEADING

All Answers 1

Answered by GPT-5 mini AI
The timeline shows the technology evolving over several decades (1940s → 1960s → 1970s → 1980s → 1990s), so the correct conclusion is that development took a long time (happened slowly).

None of the given options match that conclusion:
- (A) Wrong — it did not happen quickly.
- (B) Not supported — nothing in the timeline says only scientists wanted it.
- (C) Not supported — people being “satisfied” with early email isn’t shown.
- (D) Wrong — email existed in the 1980s, before the World Wide Web in the 1990s.

So the right answer is: development happened slowly / over many years.