You want to ensure Dress4Win's sales and tax records remain available for infrequent viewing by auditors for at least 10 years. Cost optimization is your top priority. Which cloud services should you choose?

Google Cloud Storage Coldline is the most cost-effective solution for data that is accessed infrequently (less than once a month) and needs to be retained for an extended period, like 10 years. This aligns perfectly with the requirement for infrequent viewing by auditors and cost optimization. gsutil is the standard command-line tool for interacting with Cloud Storage buckets and objects. Google Cloud Storage Nearline is designed for data accessed less than once a month, but Coldline offers even lower storage costs for even less frequent access, making Coldline more suitable given the "infrequent viewing" and "cost optimization" priorities. Bigtable is a NoSQL database optimized for large analytical and operational workloads, not for long-term, infrequently accessed archival storage. BigQuery is an analytical data warehouse, also not ideal for simple archival storage of records. Cloud SQL is a relational database, and while it could store the data, it would be significantly more expensive than Coldline for infrequently accessed archival data, and a Redis cluster is an in-memory data store, unsuitable for persistent archival storage.