Explanation/Reference:
Explanation:
Disaster recovery and business continuity are vital concerns with availability. If data is destroyed or compromised, having regular backup systems in place as well as being able to perform disaster recovery in the event of a major or widespread problem allows operations to continue with an acceptable loss of time and data to management. This also ensures that sensitive data is protected and persisted in the event of the loss or corruption of data systems or physical storage systems.

Explanation/Reference:
Explanation:
Some regulations may require specific security controls or certifications be used for hosting certain types of data or functions, and in some circumstances they may be requirements that are unable to be met by any cloud provider.

Explanation
With many SaaS implementations, data is not isolated to a particular customer but rather is part of the overall application. When it comes to data destruction, a particular challenge is ensuring that all of a customer's data is completely destroyed while not impacting the data of other customers.

Explanation
DoS/DDoS threats and risks are not unique to the public cloud model.