The correct answer is B) the invention of the silicon chip reduced the size of computers.
The aspect that made possible the spread of computer technology for widespread personal and business use was the invention of the silicon chip reduced the size of computers.
Jack S. Kilby and Robert Noyce invented the silicon chip. This silicon chip made possible the fabrication of modern computers. The miniaturized circuit board made possible more speed and the advancement needed for better computers. So it is true that the aspect that made possible the spread of computer technology for widespread personal and business use was the invention of the silicon chip reduced the size of computers.