In hardware virtualized environment, which answer best describes the drivers that are used in dom0 and the guest to communicate block I/O requests? 

Answer options:

A. QEMU emulation is used in dom0, and a blkfront driver is used in the guest.
B. A native device driver is used in dom0, and QEMU emulation is used in the guest.
C. A blkfront driver is used in dom0, and a blkback driver is used in the guest
D. QEMU emulation is used in dom0, and a native device driver is used in the guest.
E. Native drivers are used in both dom0, and the guest.

A