Your company is planning to upload several important files to Cloud Storage. After the upload is completed, they want to verify that the uploaded content is identical to what they have on-premises. You want to minimize the cost and effort of performing this check. What should you do?

The correct option leverages gsutil's built-in CRC32C hashing capabilities for both local files and Cloud Storage objects, which is efficient and minimizes effort. Cloud Storage automatically calculates and stores CRC32C checksums for all objects, making this a direct comparison. The first incorrect option involves downloading all files, which is inefficient and incurs egress costs. The second incorrect option suggests developing a custom Java application, which is unnecessary effort given gsutil's functionality. The third incorrect option also involves downloading all files and using diff, which is inefficient and costly.