Obviously the answer is letter B. ABAB
Because call and response from the world itself, there must be an interactive communication.
Call and response usually refers to a verbal or non-verbal interarction between the listener and the speaker.
When the speaker calls, the listeners response.
That’s how call and response works. That’ why the answer is ABAB because this show the interactive call and response of a certain situation.
A – may be the speaker and B – may be the listener.