The correct answer is: B. Each SCSI device must have its own ID.
SCSI (Small Computer System Interface) is a standard interface for connecting peripheral devices to a computer. SCSI devices are assigned unique IDs, called SCSI IDs, so that the computer can communicate with them. Each SCSI device must have its own unique ID, and two SCSI devices cannot have the same ID.
Option A is incorrect because two SCSI devices cannot have the same ID.
Option C is incorrect because all SCSI devices do not have to have the same ID. Each SCSI device must have its own unique ID.
Option D is incorrect because SCSI ID’s are not irrelevant. They are used by the computer to communicate with the SCSI devices.
Option E is incorrect because only option B is correct.