Early computers took up entire rooms. which of these dramatically reduced the size of computers?

microchips

transistors

compact discs

digital-video discs

microchips  

Explanation:

The size and price of computers began to decline after the 1950s. The giant machines were not profitable because of the constant maintenance costs. The main need was to replace the electric valves with a new technology that would allow a more discreet storage and would not be so responsible for generating excessive heat, avoiding overheating.  In this period, the research of the integrated circuits, the microchips, responsible for the increasing miniaturization of the electronic equipment begins.

the fact that could also be added to column b is that during world war ii, specifically between the years 1941 and 1945, japan expanded its territory towards the indonesian territory in what was known later as part of the "pacific war". in that time, japan could conquer the philipines, singapore,   borneo, central java, malang, cebu, sumatra and various other islands of the area, therefore expanding its territory for a brief period of time.

the american colonists were happy with their vicorty, but the french were mad and the french and indians were not alies, and neither were the french and colonist. i think,