When comparing software iSCSI initiators with independent hardware initiators, what are the addition

When comparing software iSCSI initiators with independent hardware initiators, what are the additional CHAP security levels available for a software implementation? (Choose two.)

A.
Do not use CHAP unless required by target.

B.
Use CHAP.

C.
Use CHAP unless prohibited by target.

D.
Do not use CHAP.