Which of the following statements is TRUE regarding cloud based solutions?

A.
In a Platform as a Service Cloud deployment, the customer chooses the operating system they want to use

B.
Automated recovery from hardware or network failures is not possible in a public cloud implementation,
only in a private clouds

C.
There are benefits to use the cloud even for small-scale applications

D.
Using firewalls to create network boundaries is sufficient for ensuring cloud security

Explanation:
http://www.ibm.com/developerworks/cloud/library/cl-cloudappdevelop/