Question ID:PT63 S1 Q9 Passage:Computer scientist: For several decades, the number of transistors on new computer microchips, and hence the microchips' computing speed, has doubled about every 18 months. However, from the mid-1990s into the next decade, each such doubling in a microchip's computing speed was accompanied by a doubling in the cost of producing that microchip. Stem:Which one of the following can be properly inferred from the computer scientist's statements? Correct Answer Choice:DChoice A:The only effective way to double the computing speed of computer microchips is to increase the number of transistors per microchip. Choice B:From the mid-1990s into the next decade, there was little if any increase in the retail cost of computers as a result of the increased number of transistors on microchips. Choice C:For the last several decades, computer engineers have focused on increasing the computing speed of computer microchips without making any attempt to control the cost of producing them. Choice D:From the mid-1990s into the next decade, a doubling in the cost of fabricating new computer microchips accompanied each doubling in the number of transistors on those microchips. Choice E:It is unlikely that engineers will ever be able to increase the computing speed of microchips without also increasing the cost of producing them.