Your Server Has Been Running with Two Hard Disks for the Last

Your server has been running with two hard disks for the last few months. You needed additional storage so you have just installed a third disk on your SCSI interface; however,when you reboot the computer,the SCSI drives are not recognized by the system. What is a possible cause?

A) you damaged the drives while installing the third disk
B) you neglected to re-install the terminator after the last disk
C) the power supply cannot handle the additional load
D) you can only install two disks on a SCSI system