Answer:
The correct answer is letter "B": Slots allow you to mount items such as expansion cards and adapters; ports allow you to connect peripheral equipment such as a keyboard, mouse, or printer.
Explanation:
Slots are dedicated spaces within certain computer hardware that allows expand it. Graphic cards or RAM (Random Access Memory) can be added to the existing hardware set up of a computer by placing more of these cards in the motherboard available slots. Ports, on the other hand, do not increase the overall performance of the computer hardware but allows them to connect externally to some other devices such as mice, keyboards, headsets, cell phones, and printers.