What extends a company's IT infrastructure to a managed service provider?

The correct answer in this context is a hybrid solution. A hybrid solution refers to a model that combines a company's on-premises infrastructure with cloud resources or services, often provided by a managed service provider (MSP). This approach allows businesses to extend their existing IT capabilities while leveraging the scalability, flexibility, and expertise that a managed service provider can offer.

By utilizing a hybrid solution, organizations can run sensitive workloads and applications in their own data centers while taking advantage of the managed services for other less critical operations or for burst capacity, cloud storage, and various cloud offerings. This enables companies to achieve a balance between control over their IT environment and the benefits of outsourcing certain IT functions to a specialized provider.

The other options may describe different aspects of IT management or service delivery but do not specifically encapsulate the concept of extending a company's infrastructure through integration with a managed service provider in the way a hybrid solution does.