The correct answer is: B. SCSI
SCSI (Small Computer System Interface) is a standard interface for connecting peripheral devices to computers. It is a high-speed, parallel interface that can transfer data at rates up to 160 MBps. This makes it the fastest option for connecting a laser printer to a computer.
RS-232 (Recommended Standard 232) is a serial interface that is commonly used for connecting modems and other low-speed devices. It is a relatively slow interface, with a maximum data transfer rate of 115 kbps.
Parallel is a parallel interface that was once commonly used for connecting printers to computers. It is a faster interface than RS-232, with a maximum data transfer rate of 1 Mbps. However, it is not as fast as SCSI.
Serial is a serial interface that is still used for connecting some devices, such as mice and keyboards. It is the slowest interface of the options listed, with a maximum data transfer rate of 115 kbps.
Therefore, the fastest option for connecting a laser printer to a computer is SCSI.