Which of the following best describes the Platform as a Service (PaaS) cloud computing service model?
a) PaaS provides a platform allowing customers to develop, run, and manage applications without dealing with the underlying infrastructure.
b) PaaS only offers infrastructure resources such as virtual machines and storage.
c) PaaS is primarily focused on delivering software applications to end-users over the internet.
d) PaaS is a hardware-based cloud computing service model.