what will be the additional CHAP security levels available for a software implementation?

When comparing software iSCSI initiators with independent hardware initiators, what will be 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.