Answer: e) a and b
Explanation: Post-implementation review is type of evaluation that is done after the project to see whether the goal is achieved or not. It helps in judging the effective execution of project, efficiency to achieve profit , objective towards the user requirements are met ,any improvement or correct is required in SDLC(system development life cycle) mechanism of organization etc.
Other option is incorrect because it does not switch data from phase to another.Thus, the correct option is option (e).