What type of scenario would be best served by using a Platform as a Service (PaaS) cloud model?

a. A group of developers needs access to multiple operating systems and the runtime libraries that the OS provides.
b. An organization wishes to gain access to applications through an online user interface, while maintaining compatibility across operating systems.
c. An organization needs to have a hosted virtual network infrastructure for their services, which are run on virtual machines.
d. A small organization needs to have high availability for their web server.

ANSWER: a