The correct selection is A, C. A Full sandbox used for production defect analysis should remain aligned with the production release state. Refreshing after production deployments and rehearsing every production-bound deployment in that sandbox make it far more likely that a production defect can be reproduced and diagnosed under equivalent metadata conditions. From an operating perspective, production stability depends on disciplined incident handling, environment synchronization, backup/recovery, observability, and control of configuration drift. Emergency actions can be faster than normal releases, but they still require traceability and must be reconciled back into the managed development baseline. The other options are weaker because they either expose production to unnecessary risk or do not reconcile the operational change back into the governed lifecycle. For this scenario, the decisive point is therefore the platform behavior represented by the selected options (A. Refresh the full sandbox after every deployment in production.; C. Before any deployment in production, the same process must be performed in this sandbox.). Applying that rule consistently keeps the implementation aligned with Salesforce-supported lifecycle practices and makes the resulting change easier to review, validate, and operate across environments.

Study Guide reference: Operating — production governance; environment drift; incident response; backup/recovery; post-refresh controls; hotfix synchronization.