ACSM Certified Personal Trainer (#65)

Which of the following is the BEST definition of an Incident?

A warning that a threshold has been reached, something has changed, or a failure has occurred
An unplanned interruption to an IT service or reduction in the quality of an IT service
A change of state which has significance for the management of a Configuration Item or IT Service
Loss of ability to operate to specification, or to deliver the required output