Correct Option: A

Electrical engineer, Jack Kilby invented the integrated circuit aka the microchip. By definition the intergrated circuit or microchip is a set of interconnected electronic components such as transistors and resistors, that are etched or imprinted on a onto a tiny chip of a semiconducting material, such as silicon or germanium. The microchip shrunk the size and cost of making electronics and impacted the future designs of all computers and other electronics. The first successful demonstration of the microchip was on September 12, 1958.