Which item correctly describes what a virtual machine contains?

A virtual machine (VM) is primarily defined by its configuration files, which specify its virtual hardware (e.g., virtual CPU cores, RAM, disk size, and network interfaces). These virtual resources are then mapped to and backed by the physical resources of the host server, managed by a hypervisor. The hypervisor allocates and arbitrates access to the actual physical NIC, RAM, disk, and CPU among multiple VMs. Incorrect options: "physical resources such as the NIC, RAM, disk, and CPU" is incorrect because a VM uses virtual resources, not direct physical ones. The physical resources belong to the host. "applications running on the hypervisor" is incorrect because applications run inside the guest operating system of a VM, not directly on the hypervisor. The hypervisor's role is resource management. "processes running on the hypervisor and a guest OS" is incorrect because while a VM does have a guest OS with its own processes, the VM itself is not defined by these processes but by its virtual hardware configuration. The hypervisor runs its own processes to manage VMs, but these are distinct from the VM's contents.