A simple CPM network has three activities, A, B, and C. A is an immediate predecessor of B and of C. B is an immediate predecessor of C. The activity durations are A=4, B=3, C=8. Select one: a. The network has no critical path. b. The critical path is A-C, duration 12. c. The critical path is A-B-C, duration 15. d. The critical path is A-B-C, duration 13.5 e. The critical path cannot be determined without knowing expected activity times.

select any one of the statement fit to the given scenario in question