Chet meets each Wednesday night at his local bookstore with a small group of computer enthusiasts. The group calls itself X-Hackers because at one time all of these select members were hackers. Today, members of the group have similar values and have pledged to stop computer hacking. Which membership factor best describes what brings this group together?

The membership factor that best describes what brings this group together is the fact that at one time all of these select members were hackers. When the group members are similar, it's easier for the group to become cohesive. The similarity can be due to several factors, such as having similar values, beliefs, life circumstances, or pressing life issues. In the present case, the members share the same skills, a similar history and a similar purpose.