Explanation
Mandatory breach reporting is the best example of regulated PII components. The rest are generally considered components of contractual PII.

DLP solutions may protect against inadvertent disclosure. Randomization is a technique for obscuring data, not a risk to data. DLP tools will not protect against risks from natural disasters, or against impacts due to device failure.

If an organization wants to use a cloud service for BCDR, the location of the cloud hosting becomes a very important security consideration due to regulations and jurisdiction, which could be dramatically different from the organization's normal hosting locations. Availability is a hallmark of any cloud service provider, and likely will not be a prime consideration when an organization is considering using a cloud for BCDR; the same goes for self-service options.
Resource pooling is common among all cloud systems and would not be a concern when an organization is dealing with the provisioning of resources during a disaster.

The physical security of crypto keys is of some concern, but guards or vaults are not always necessary.
Two-person integrity might be a good practice for protecting keys. The best answer to this question is option A, because it is always true, whereas the remaining options depend on circumstances.