A scientific organization must copy text and image files from a source Amazon S3 bucket (owned by Account A) to a destination S3 bucket in a second AWS account (Account B). Several radar stations upload time-sensitive data to the source bucket; each station's objects use a unique key prefix. Replication is implemented with an S3 replication rule that covers all objects in the source bucket. One radar station produces the most accurate data and its objects must be monitored to confirm replication completes within 30 minutes of upload. Which approach will meet these requirements?

The correct answer is to enable S3 Replication Time Control (S3 RTC) on a replication rule specific to the high-accuracy radar station's prefix. S3 RTC provides a 99.99% service level agreement (SLA) to replicate most objects within 15 minutes, making it suitable for the 30-minute requirement. S3 RTC also publishes CloudWatch metrics for replication latency, which can be monitored with an EventBridge rule to alert if the threshold is exceeded. Incorrect options: AWS DataSync is for large-scale, one-time or periodic data transfers, not real-time replication with a strict latency requirement. Monitoring TRANSFERRING status doesn't guarantee replication completion within 30 minutes. Creating a separate destination bucket and rule for the high-accuracy station is unnecessary and doesn't inherently provide the required latency guarantee or monitoring capabilities that S3 RTC offers. S3 Transfer Acceleration speeds up uploads to S3 but does not guarantee replication time between buckets. Monitoring TotalRequestLatency on the destination bucket is not a direct measure of replication time.