The correct answer is: A. Any open SCSI port on the computer.
SCSI (Small Computer System Interface) is a standard interface for connecting peripheral devices to a computer. It is a parallel interface, which means that multiple data bits are transferred at the same time. SCSI devices are typically connected to a SCSI host adapter, which is a card that plugs into the computer’s motherboard. The host adapter has a number of SCSI ports, which can be used to connect multiple SCSI devices.
When connecting two internal SCSI hard disks to a computer, you would connect the second hard drive to any open SCSI port on the computer. The first hard drive would be connected to the first SCSI port on the host adapter.
Option B is incorrect because a serial port is a different type of interface than a SCSI port. Serial ports are typically used for connecting devices such as modems and mice.
Option C is incorrect because a parallel port is also a different type of interface than a SCSI port. Parallel ports are typically used for connecting printers.
Option D is incorrect because the first hard drive is already connected to the first SCSI port on the host adapter.
Option E is incorrect because there is no other option that is correct.