Final answer:
The minimum role required to view confidential HR profile data is HR admin, as they manage and safeguard sensitive employee information.
Step-by-step explanation:
The role required at minimum to view confidential HR profile data is option b) HR admin. This role is typically responsible for managing and safeguarding sensitive employee information, including personal details, performance evaluations, and salary information. Employees usually do not have access to confidential data of other employees, whereas HR admins are granted privileges to view and manage this data as part of their job responsibilities. System Admins may also have access depending on the system's configuration, but HR admin is the specific role tied to HR data management. Employee Service Center Users would generally not have access to such confidential data unless their specific role within the service center warrants it.