which two tasks are performed by VMKernel?

When using a hardware iSCSI initiator with an ESXi host, which two tasks are performed by VMKernel? (Choose two)

A.
Encapsulation of iSCSI PDUs TCP/IP packets

B.
Mapping requests for blocks on the virtual disk to blocks on the appropriate physical device

C.
Issuing SCSS commands to the virtual disk

D.
Encapsulation of I/O requests into iSCSI Protocol Data Units (PDUs)

Explanation:
Using HW iSCSI adapter it will offload from the VMkernel to the HW iSCSI adapter:

Encapsulation of iSCSI PDUs TCP/IP packets
and
Encapsulation of I/O requests into iSCSI Protocol Data Units (PDUs)

Hence the VMkernel does not perform these two tasks making these the correct answers:

Mapping requests for blocks on the virtual disk to blocks on the appropriate physical device
and
Issuing SCSS commands to the virtual disk

Page 68 from vsphere-esxi-vcenter-server-50-storage-guide.pdf