Your Azure DevOps free-tier organization has 10 private projects and multiple independent jobs per project. Builds require access to files on an on-premises file system. You run jobs on five self-hosted agents but experience long queues and slow build completion. What should you do to reduce queued builds and decrease build time?

The correct answer is to purchase self-hosted parallel jobs. Your organization already uses self-hosted agents, which are necessary because builds require access to an on-premises file system. Purchasing self-hosted parallel jobs increases the number of concurrent jobs your self-hosted agents can run, directly addressing the long queues and slow build times. Configuring pipelines to use Microsoft-hosted agents is incorrect because these agents cannot access your on-premises file system, making them unsuitable for your build requirements. Registering additional self-hosted agents without purchasing parallel jobs will not reduce queue times, as the free tier only allows one concurrent job regardless of the number of agents. Purchasing Microsoft-hosted parallel jobs is incorrect for the same reason as using Microsoft-hosted agents: they lack access to your on-premises resources.