In digital communication, what does the term "bit rate" refer to?

A) The number of bits in a signal

B) The number of bits transmitted per second

C) The quality of the transmission

D) The frequency of the signal

Answer: B) The number of bits transmitted per second

Explanation: Bit rate measures how many bits are transmitted or processed in a unit of time, usually expressed in bits per second (bps). It is a key factor in determining the quality and speed of digital communication.