Which of the following is an enabler of best practice?

Standards such as ISO/IEC 20000 are a source of best practice - they define what good service management looks like - rather than an enabler that facilitates how practices are put into action.

ITIL distinguishes between sources of best practice, which inform what good practice looks like, and enablers of best practice, which make adoption and execution possible. Technology is the enabler because it supplies the automation, tooling, monitoring, and infrastructure required to put best practices into operation at scale. Standards, academic research, and internal experience all fall into the 'sources' category because they contribute knowledge and principles rather than facilitating implementation.

Academic research is a source of best practice that contributes theoretical knowledge and evidence, but it does not provide the operational mechanisms needed to enable adoption.

Internal experience is a source of best practice derived from lessons learned within the organization and does not function as an enabler that makes implementation of practices possible.