Possible answers:
a). 50.
b). 40.
c). 20.
d). 10.
Given those answer options, answer the question: Read the following article and answer the question. Article: Our "Timeline of Education" shows highlights of learning and education (especially related to Western education), going back to the very first education: In the beginning: Adam got the very first lesson, from God: break the law and you pay the price. 3000 B.C. :Priests teach religion, writing, sciences. 0 B.C./A.D.: Jesus teaches in Jerusalem. 105 A.D.: Paper is invented in China. 1150-1250 : "Modern" universities founded. 1620s: Slide rule is invented, math is made easier. 1918 : All U.S. states require free education Early 1980s: Television in the classroom. The availability of cheap VCRs makes video learning common. Late 1990s: The Internet changes everything. E-learning courses develop. http://www.worldwidelearn.com/education-timeline/education-timeline.htm#3000BC Question: It took about  _   years from the television to Internet. Answer:
A:
c).