Which sentence from the article suggests that the Internet developed slowly at first?
A In 1965, another scientist developed a secure way of sending information from one computer to another.
B By the end of 1969, there were still only four computers connected to the ARPAnet.
ะก However, during the 1970s, new local networks sprang up around the world and the worldwide network steadily grew.
D Throughout the 1980s, researchers and scientists used the Internet to send files and information from one computer to another.โ