Which of the following is used to identify potential issues with a proposed change prior to implementation?

A request form is documentation for initiating a change, not for testing or identifying issues prior to implementation.

A rollback plan outlines steps to revert a change if issues occur during or after implementation, rather than identifying issues beforehand.

End-user acceptance is a validation step performed by users after a change has been implemented, not for identifying issues prior to implementation.

Sandbox testing involves deploying a proposed change in an isolated, non-production environment to simulate its effects and identify potential issues before it impacts live systems. This allows for thorough testing and validation, ensuring that any problems can be addressed without risking critical operations.