It will best for Sara to use PaaS as a service delivery model as it will provide multiple hosting environments, PaaS Key characteristics are:
- Support multiple languages and frameworks
- Multiple hosting environments
- Flexibility(plugins)
- Allow choice and reduce lock-in
- Ability to auto-scale

This is true, When cloud assessment is done, it is very important to understand the scope of the audit and the standard used. In statement above, we can see that, audit scope ofSSAE16 is decided by cloud provider and can be very limited and one may not be get full visilibility into the security of the cloud service provider.

Often, this type of questions looks simple, but a confusion is created and you need to be careful while picking up the right options ln our case, metered pricing and metered servicing looks similar but Metered pricing is one of the characteristics of cloud computing.

Its always a shared responsbility