Final answer:
The most expensive data storage type is generally 'Hot' storage because it provides high-speed data access and immediate availability, which requires a more costly infrastructure.
Step-by-step explanation:
The most expensive data storage type among the options listed is generally C) Hot storage. Hot storage is designed for data that needs to be accessed quickly and frequently, which typically commands a higher price due to the infrastructure required to deliver high-speed data access and immediate availability.
Unlike hot storage, archived (or archival) storage and cold storage are less expensive because these are used for data that is accessed less frequently and can tolerate longer retrieval times. Warm storage is a middle ground between hot and cold storage, offering moderate access speed and cost.