Your Team Is Allocated a Project Involving a Major Client

Your team is allocated a project involving a major client, the Beswick Company. Although the organization has many clients, this client, and project, is the largest source of revenue and affects the work of several other teams in the organization. The project requires continuous involvement with the client, so any problems with the client are immediately felt by others in the organization.
-Jamie, a member of your team, is the only person in the company with whom this client is willing to deal. It can be said that Jamie has

A) a high degree of nonsubstitutability.
B) a low degree of centrality.
C) a high level of discretion.
D) referent power.
E) a low level of visibility.