The Public Cloud model (option a) is the one that provides access to Microsoft Office apps through Microsoft 365, accessible over the internet and hosted on Microsoft's servers.
The type of cloud model that provides access to Microsoft Office apps is a) Public Cloud. Microsoft offers Microsoft 365 (formerly Office 365) through the public cloud, allowing users to access Office applications like Word, Excel, PowerPoint, and Outlook over the internet. These services are hosted on Microsoft's servers and are accessible anytime, anywhere, assuming you have an internet connection.
Public cloud services are designed to be scalable and flexible, providing solutions for consumers and businesses alike. With a subscription to Microsoft 365, a user doesn't need to install or maintain any hardware or software, as Microsoft takes care of these aspects.
So, the public cloud model is ideal for delivering widely-used applications, including those provided by Microsoft, to a large user base with minimal user-end requirements.