If an activity on the critical path takes longer than planned and falls behind schedule, what effect will this have on the entire project? a. It will not have an effect on the project if the critical path activity has free float. b. It will only have an effect on its successor activity, not the entire project. c. It will increase the length of the entire project by the amount of schedule slippage for the activity. d. It will not have an effect on the project if the critical path activity has total float