A software development firm is evaluating different cloud service models for its operations. Which of the following choices would be MOST appropriate if the firm wants to maintain control over the operating systems and deployed applications, but doesn't want to manage the underlying cloud infrastructure?A$)$ Software as a Service $($SaaS$)$B$)$ Infrastructure as a Service $($IaaS$)$C$)$ Platform as a Service $($PaaS$)$D$)$ Bare Metal as a Service $($BMaaS$)$