Reference:
https://docs.microsoft.com/en-us/azure/azure-sql/database/sql-data-sync-data-sql-server-sql-database Basic Concept: This question tests plan and implement data platform resources in the DP-300 exam context.
The correct choice is determined by the exact service boundary and operational requirement stated in the scenario.
Why B is Correct: SNAPSHOT matches the expected DP-300 administration action. SNAPSHOT is an Azure data-platform feature, but it must match the workload model, service tier, migration path, or deployment constraint described in the scenario. The question is not asking for a general Azure capability; it is asking for the feature that produces this result: Which isolation level should you configure?
Why A is Wrong: SERIALIZABLE is an Azure data-platform feature, but it must match the workload model, service tier, migration path, or deployment constraint described in the scenario. It applies to a different Azure data-platform design than the one the question is testing.
Why C is Wrong: READ UNCOMMITTED is an Azure data-platform feature, but it must match the workload model, service tier, migration path, or deployment constraint described in the scenario. It mismatches the target platform, migration method, compute tier, or deployment model described in the scenario, so it would not satisfy the workload as stated.
Why D is Wrong: READ COMMITTED is an Azure data-platform feature, but it must match the workload model, service tier, migration path, or deployment constraint described in the scenario. It applies to a different Azure data-platform design than the one the question is testing.