A Simple CPM Network Has Three Activities, A, B, and C

Multiple Choice

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=5.

A) The critical path is A-B-C, duration 9.
B) The critical path is A-B-C, duration 12.
C) The critical path is A-C, duration 10.5.
D) The critical path cannot be determined without knowing PERT expected activity times.
E) The network has no critical path.