A healthcare and life sciences client wants to maintain electronic patient records, including medical images, for a period of seven years. How would the IT storage industry describe this business goal?（）

• A、an archive solution that requires event-based retention
• B、a backup solution that provides version-based expiration
• C、a PACS environment that provides two year litigation hold
• D、a business continuity solution that provides two years Recovery Time Objective (RTO)