The network diagram for the project to create logical e-mail groups has three paths that have a duration of 29 days and two paths that have a duration of 10 days, respectively, the longest and shortest durations for the project. Which of the following is a true statement?

a. If the shortest paths are the same length, the path with the least number of activities is the critical path

b. If the shortest paths are the same length, there can be multiple critical paths and the more critical paths there are on a project, the greater the increase of risk to the project

c. If the longest paths are the same length, the path with the greatest number of activities is the critical path

d. If the longest paths are the same length, there can be multiple critical paths and the more critical paths there are on a project, the greater the increase of risk to the project