The Systems Development Life Cycle (SDLC) is a process of creating oralteringinformation systems， and the models and methodologies that people use todevelop thesesystems.Sequential SDLC models， such as ( ) ， focus on complete andcorrect planning togrude large projects and risks to successful and predictable results.

A.Waterfall

B.ExtremeProgramming

C.Spiral

D.RapidPrototyping