Which of the following best describes the 'Additive Increase Multiplicative Decrease' $($AIMD$)$ principle in TCP$?$

Question $9$ options:

TCP increases its congestion window size by a fixed amount and halves it upon detecting congestion

TCP$\text{'}$s congestion window size remains constant throughout the transmission

TCP increases its congestion window size exponentially and decreases linearly

TCP randomly adjusts its congestion window size

TCP increases its congestion window size linearly and decreases exponentially

TCP doubles its congestion window size and reduces it to a quarter upon congestion

TCP increases and decreases its congestion window size linearly