Various tools and techniques are available to sequence activities, and several factors can help to determine which tool or technique to select. When a project manager decides to include sub-networks or a fragment network as part of his or her scheduling technique, what does this decision say about the project?

a. The work is unique requiring special network diagrams at various stages.

b. Software that manages resources is available over an existing electronic network.

c. Several identical or nearly identical series of activities are repeated throughout the project.

d. Multiple critical paths exist in the project.