Managing transactions in Guidewire requires a deep understanding of Bundles. The modern and safest way to handle a transaction is using the runWithNewBundle(\ bundle - > { ... }) block (Option B).
When using runWithNewBundle, the Guidewire platform automatically handles the " Plumbing " of the transaction. It opens the bundle, provides a safe execution context, and automatically commits the changes when the block reaches the end. Therefore, a critical best practice is to never call commit() manually inside that block (Option F). Doing so can interfere with the platform ' s error-handling and post-commit logic. Option E is used for UI-bound bundles (like those in a PCF), but for background logic or integration, a fresh, managed bundle via runWithNewBundle is the gold standard for avoiding data leakage or accidental modifications.
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