Which of the following BEST describes a Change Authority?

The Change Advisory Board is one specific example of a Change Authority but does not represent the full definition, which can include individuals and other groups beyond a CAB.

This definition is incomplete because it restricts Change Authority to only 'a person,' excluding the possibility of it being a defined role or a group of people.

ITIL defines Change Authority broadly as a role, person, or group of people that provides formal authorization for a particular type of change. This definition is intentionally inclusive to accommodate different organizational structures where authorization may rest with an individual, a named role, or a collective body such as a board. The breadth of this definition is what distinguishes the correct answer from the incomplete alternatives.

The Change Manager is one possible holder of Change Authority but is not the exclusive or complete definition; authorization responsibility can be assigned to various roles or groups depending on change type.