A copy job is retried after half of a batch was committed. Orders appear twice. Which two changes directly address safe recovery? Select 2 answers.

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A.Use idempotent destination processing keyed to the intended business event
B.Disable validation because the activity eventually reports success
C.Retain checkpoints or tracked progress for resume/replay
D.Assume retry delivery means exactly-once business effects

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Use idempotent destination processing keyed to the intended business event
Retain checkpoints or tracked progress for resume/replay

Tracked progress and idempotent writes support recovery without repeated business effects. Success flags do not reconcile results, and retries can duplicate delivery/effects unless the end-to-end design prevents them. Source guide: PDF page 32-34.

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