A company wants every employee to have AI assistance in the tools they already use, with no engineering project and no configuration. Which layer should it buy at?

• AModels, calling a foundation model directly from an internal tool.
• BPlatforms, so the organisation can tune and govern its own deployments.
• CApplications, adopting a finished product that already embeds the model.
• DInfrastructure, so the organisation controls where inference runs.