What present-day device did the invention of the transistor most directly influence?

A) Automobile

B) Light Bulb

C) Atomic bomb

D) Laptop Computer

D. Laptop computer is the present-day device that has a transistor because

Automobiles and the atomic bomb definitely do not have transistors.

The light bulb has a resistor, not a transistor, although they rhyme perfectly.

A transistor can be defined as, from a Google search, " a semiconductor device with three connections, capable of amplification in addition to rectification."