A company has been seeing increased time to market as their application changes and grows over time. After analysis, the company discovers when changes need to be made it is often going back to the planning phase, and repeatedly researching the same subsystems for updates, then going on to requirements gathering and finally getting back to the specification update and implementation. Which approach should the analyst recommend to best help minimize the time? a. Use the XP approach to develop the entire project at once. b. Use the RAD approach to reduce scope creep introduced by user feedback. c. Use the agile approach, so changes that come along can be implemented more quickly. d. Use the SDLC approach to make sure the design follows the specification