The right answer is D.

Predictive, Iterative and Incremental life cycles are 3 of the four types of project life cycles, with agile being the fourth. Iteration-based agile exists within the agile methodology or life cycle and the other type with it is flow-based agile. In iteration-based agile, the team works in iterations (timeboxes of equal duration) to deliver completed features. In flow-based agile, the team pulls features from the backlog based on its capacity to start work rather than on an iteration-based schedule.

show less