Which kind of devices allows the user to add components and capabilities to a computer system?

A. System boards

B. Storage devices

C. Input devices

D. Output devices

E. Expansion slots

Answer: Option E

Solution(By Examveda Team)

In computing, the expansion card, expansion board, adapter card or accessory card is a printed circuit board that can be inserted into an electrical connector, or expansion slot, on a computer motherboard, backplane or riser card to add functionality to a computer system via the expansion bus.

Source : wikipedia.org