कंप्यूटर इकोसिस्टम में 'ड्रॉपबॉक्स' (Dropbox) का लोकप्रिय और प्राथमिक उपयोग निम्नलिखित में से कौन सा है?

Which of the following is an example of a cloud storage service?

Consider the following statements regarding the advantages of Cloud-Hosted NoSQL services: A. Managed operations allow the cloud provider to handle provisioning, patching, and backups, resulting in zero operational overhead for the user. B. Elastic serverless scalability, such as that found in Amazon DynamoDB, allows systems to auto-scale with zero capacity planning. C. Multi-region global distribution enables geographic fault tolerance and low-latency access worldwide. D. The pay-per-use pricing model requires significant upfront CAPEX to secure storage and read/write throughput. Choose the most appropriate answer from the options given below: