Final answer:
SaaS would require the least management and support from the company as it includes management of software, platform, and infrastructure by the service provider.
Step-by-step explanation:
Of the options provided, Software as a Service (SaaS) will require the least management and support from the company. In a SaaS model, all aspects of the software, including its infrastructure, platform, and software are managed by the service provider. The company simply uses the software through the internet. This eliminates the need for on-site infrastructure, as well as the associated management tasks such as backups, updates, and patch management.
Infrastructure as a Service (IaaS) provides virtualized computing resources over the internet but requires the company to manage the operating systems, applications, and sometimes databases. Platform as a Service (PaaS) provides a platform allowing customers to develop, run, and manage applications without the complexity of building and maintaining the infrastructure but still requires some management of the applications and databases. Software-Defined Networking (SDN) is a technology approach to managing networking through software and is not a cloud service model.