Documents arrive throughout the day and must be processed within 30 hours of arrival. The pipeline uses the Message Batches API, which can take up to 24 hours to process a batch, and currently submits one batch every 24 hours. How should submission be scheduled?

Answer: C — Submit about every 4 hours, keeping wait plus processing under 30 hours

Worst-case latency is the wait for the next submission plus up to 24 hours of processing. Every 4 hours gives about 28 hours, inside the SLA with margin. Daily (a) gives 48 hours, and batches have no latency guarantee. Every 12 hours (b) gives 36, and every 8 hours (d) gives 32, both over the SLA.