Which of the following statement is true? Question 3Select one: a. The critical path for a project is the shortest path through the project's network. b. Many activities have slack time; if we add these slack times together, this represents the potential improvement in early completion for the project. c. Project crashing is a method for shortening a project's duration by reducing the time of one (or more) of the critical path activities to less than its normal time. d. Crashing costs increase as project time increases. e. A network diagram is a hierarchical decomposition of the project scope into work elements to be executed to produce the project deliverables