An enterprise needs business email and collaboration tools without provisioning servers or applying software updates. Which cloud service model should they adopt?
A. Infrastructure as a Service (IaaS), allowing the company to rent virtual machines and install its own email software.
B. Platform as a Service (PaaS), allowing developers to build custom email apps on a managed runtime environment.
C. Software as a Service (SaaS), where the provider delivers a fully managed, ready-to-use application over the internet.
D. Bare-metal hosting, giving the company dedicated hardware with full control over the email server software stack.
SaaS delivers fully managed applications over the internet, eliminating the need for the customer to manage any infrastructure or software.