QUESTION 4 What is the primary difference between vSphere ESX and ESXi? O A ESX is type-2 hypervisor, while ESXi is type-1 hypervisor. B. ESX implements I/O stack in VMkernel, while ESXi implements it in service console. OC. ESX implements management framework and infrastructure agents in service console, while ESXi implements them in VMkernel. OD. ESX implements management framework and infrastructure agents in VMkernel, while ESXi implements them in service console