Answer: d) Extreme programming
Step-by-step explanation:
Extreme programming is one of the most significant programming improvement system of Agile models. It is utilized to improve programming quality and receptive to client's requirements. The extreme programming model suggests taking the prescribed procedures that have functioned admirably in the past in program improvement ventures to extreme levels. It also
tries to decrease cost of changes in requirements by having multiple short development cycles. Project are divided into smaller functions and developer cannot go to the next stage until it completes the current stage.