Question 17 Pessimistic time is: A the maximum period of time for an entire project to be completed B the planner's "best guess" of the amount of time the activity actually will require for completion the minimum period of time for an activity to be completed D the maximum period of time for an activity to be completed Question 18 Which of the following are project management phases? A planning the project B) executing the project closing down the project D all of the above