What is the family of Small Computer System Interface /SCSI) standards that define characteristics of the multi-signal I/O bus versions of the SCSI Interface?

What is the family of Small Computer System Interface /SCSI) standards that define characteristics of the multi-signal I/O bus versions of the SCSI Interface?

A.
Serial SCSI

B.
SCSI address

C.
SCSI parallel Interface

D.
SCSI Enclosure Services