Transistor short note

A transistor is a device that can either switch an electric current on and off, or amplify an electric current. The main component in a microchip is the transistor. Computers operate on a binary system, which uses only two digits: 0 and 1, all kinds of information are converted into combinations of 1s and 0s. As transistors can act as a switch, therefore their application in a computer microchip is to either let current through, representing the binary digit 1, or cut it off, representing 0.

a study funded by private corporations refuting global warming

i think the answer is b.