Changes to a project will still occur, even with good plans. The project manager Question 6 options: a) needs to be sure that team members casually agree to changes that may require additional person-hours. b) should estimate the effects on the project cost and schedule rather than having appropriate personnel estimate the effects of the change. c) controls the communication about the change and limits who knows a change has occurred. d) has project team members and the customer participate up front in the decision to change the project