12. Which one is correct for Critical path method.

A. The critical path is the longest sequence of activities in a project plan which must be completed on time for the project to complete on due date.

B. An activity on the critical path cannot be started until its predecessor activity is complete.

C. If critical activity is delayed for a day, the entire project will be delayed for a day.

D. The sequence of critical activities in a network is called critical path.

E. All