How did the microchip change computers during the 1990s apex?

The development of microchip (or integrated circuits) made computers more smaller, much faster, and more powerful. Microchips allowed number of transistors to increase in chips, doubling roughly every two years in accordance to Moore’s law. They are easier to produce, requires less power, and costs lower. Microchips helped embed computer in mobile PC’s, laptop, phones, watches, and even home appliances.

i think the answer is a and i hope this ; ))

well that depends on how deep the hole is. you'd first go through te crust of the earth, then the upper mantle, then the lower mantle then the outer core, then the inner cor then you'd be stuck in the core to melt.