Final answer:
Data at rest is stored information that resides in non-volatile storage such as cloud storage and hard drives, not in volatile memory like RAM.
Step-by-step explanation:
Data at rest refers to information that is not actively in transit or being processed; it is stored on a device or medium. When we consider places where data at rest can be found, RAM (Random Access Memory) is typically not considered as such because RAM is a type of volatile memory used for storing data temporarily while a computer is running. Once the power is off, the data in RAM is lost. In contrast, cloud storage and hard drives serve as storage mediums where data can be retained even when not in use and power is off, making them correct examples of where data at rest can be found. So, the right answers are options b (cloud storage) and c (hard drives).