Why was the microchip essential to improving computers?

o because it ensured the security of computers

o because it gave birth to the Internet

o because it required a keyboard and a screen

o because it downsized the scale of the computer itself

What is the main difference between primary and secondary sources? a. primary sources are historical documents, and secondary sources are modern-day documents. b. primary sources are derived from museums and archives, and secondary sources are created by history students and academics. c. primary sources are found in ancient places with a rich history, and secondary sources are found in historical journals and blogs. d. primary sources are created during a particular historical era, and secondary sources are created by studying primary sources.