Final answer:
An agreement on response time will trigger an SLA, which relates to the performance commitments made by a service provider. Other options like prior approval, acceptance of service, and signing the contract are associated with the SLA formation, not triggers.
Step-by-step explanation:
In the context of a Service Level Agreement (SLA), the conditions that can trigger the SLA typically relate to the performance standards to which a service provider is committing. Among the options provided, agreement on response time is the condition that will likely trigger an SLA. This means that the SLA includes stipulations regarding how quickly the service provider must respond to a service issue or request, and failure to meet this response time can result in SLA violations and possibly penalties or other remedial actions.
Prior approval from the supervisor, acceptance of the service, and signing the contract are steps or processes that might be associated with the formation of an SLA but are not the triggers for the SLA itself. The trigger is an event or condition, such as a metric or a level of service, specified in the SLA that, when breached, initiates a response or action as outlined in the agreement.