The correct answer is B. serial.
A COM port is a serial port, which is a type of communication port that sends data one bit at a time. Serial ports are typically used for connecting devices such as modems, mice, and printers.
A parallel port is a type of communication port that sends data eight bits at a time. Parallel ports are typically used for connecting printers.
A static port is a type of communication port that is always connected to a device. Static ports are typically used for connecting devices such as hard drives and network cards.
A multi-port is a type of communication port that can connect to multiple devices. Multi-ports are typically used for connecting devices such as hubs and switches.
SCSI is a type of communication port that is used for connecting high-speed devices such as hard drives and scanners.
I hope this helps!