The correct response is time sharing/multitasking operating system.
A time sharing operating system allows multiple users to interact with a computer system simultaneously. In this case, various computers connect to a single host computer and share its resources, which is characteristic of a time-sharing setup.
The other options pertain to different operating system models:
- Batch operating system processes jobs in batches without manual intervention.
- Network operating system connects multiple computers over a network but does not specifically describe the setup of connecting multiple computers to a single host in the manner described.
- Real-time operating system is designed for systems that require immediate processing and response to inputs.