Why do computers use binary numbers?

a$.$ It is easier to build electronic devices reliably if they only have to distinguish between two electric states.

b$.$ Because there are $10$ types of people: Those who understand binary, and those who don't.

c$.$ It is impossible to build a computer that uses a different number base than binary.

d$.$ It makes the computer faster and more efficient than other number bases.

e$.$ At the time when computers were invented, humans only knew about the numbers $0$ and $1.($order shuffled$)$