Which of the following cloud services would MOST likely be selected by a software development company that needs a cloud in which to develop software and does not have infrastructure requirements?

PaaS (Platform as a Service) abstracts all underlying infrastructure and provides developers with a pre-configured environment including runtime, middleware, and development tools. A software company can focus entirely on writing and deploying code. This eliminates the need to provision or manage VMs, OS patches, or network configurations.

SaaS delivers fully built applications to end users (e.g., email, CRM) and is not a development platform.

IaaS provides raw virtualized infrastructure (VMs, networking, storage) that still requires the customer to manage OS and middleware, which contradicts the 'no infrastructure requirements' condition.

XaaS is an umbrella term meaning 'Everything as a Service' and does not describe a specific cloud model appropriate for development environments.