When a Xen Based Guest VM Makes a Request for a Hardware

Multiple Choice

When a Xen based guest VM makes a request for a hardware resource, such as reading from a disk, where is the request sent to?

A) It is sent directly to the hardware on the host machine.
B) It is sent to the Domain 0 guest.
C) It is sent to the host operating system, which then handles the request.
D) It is queued into the guest VM's I/O page table.