The United States has a myriad of regulations focused on specific types of data, such as healthcare and financial, but lacks an overall comprehensive privacy law on the national level.
The European Union, the Asian-Pacific Economic Cooperation, and Russia all have national privacy protections and regulations for the handling the PII data of their citizens.

Explanation
Cloud services make exclusive use of virtualization, and systems change over time, including the addition, subtraction, and reimaging of virtual machines. It is extremely unlikely that the exact same virtual machines and images used in a previous audit would still be in use or even available for a later audit, making the tracking of changes over time extremely difficult, or even impossible. Elasticity refers to the ability to add and remove resources from a system or service to meet current demand, and although it plays a factor in making the tracking of virtual machines very difficult over time, it is not the best answer in this case. Resource pooling pertains to a cloud environment sharing a large amount of resources between different customers and services.
Portability refers to the ability to move systems or services easily between different cloud providers.

Explanation
The guidelines from ASHRAE establish 64.4-80.6degF (18-27degC) as the optimal temperature for a data center.