A company is using Amazon Neptune as the graph database for one of its products. The company's data science team accidentally created large amounts of temporary information during an ETL process. The Neptune DB cluster automatically increased the storage space to accommodate the new data, but the data science team deleted the unused information.
What should a database specialist do to avoid unnecessary charges for the unused cluster volume space?

A. Take a snapshot of the cluster volume. Restore the snapshot in another cluster with a smaller volume size.
B. Use the AWS CLI to turn on automatic resizing of the cluster volume.
C. Export the cluster data into a new Neptune DB cluster.
D. Add a Neptune read replica to the cluster. Promote this replica as a new primary DB instance. Reset the storage space of the cluster.