Consider the following list: 1. Change authority 2. Change manager 3. Change advisory board (CAB) Which one of the following is the BEST description of the items above?

Job descriptions are formal HR documents tied to positions, whereas these are ITIL roles that can be assigned situationally.

Functions in ITIL refer to self-contained units with dedicated resources (e.g., service desk), which these are not.

Teams implies a fixed group of people, but change authority and change manager can be a single individual, not necessarily a team.

ITIL defines a role as a set of responsibilities and authorities granted to a person or team, and acknowledges that roles can be performed by individuals, named people, or groups such as the CAB. These three items represent flexible role designations rather than rigid organizational structures, which is why 'roles, people or groups' is the most accurate description.