Final answer:
The role responsible for new member selection and external representation of an organization is typically an executive overseeing external affairs. This can include duties like public relations and stakeholder engagement, resembling tasks of a new president such as cabinet nomination.
Step-by-step explanation:
The individual responsible for overseeing the new member selection process and representing the organization in external affairs is often a high-ranking executive within the organization. Given the choices presented, the role that best fits this description is d) Executive overseeing external affairs. This executive might also take on responsibilities related to public relations, stakeholder engagement, and partnership development alongside managing the process of integrating new members into the organization.
For example, a challenging task for new presidents, such as in the United States, includes nominating and gaining confirmation for their cabinet and hundreds of other officials, which is reflective of the responsibility to manage new member selection within an organization.