The correct answer is: C. connects various components within the computer.
A system bus is a group of wires that allow different parts of a computer to communicate with each other. It is a physical connection that allows data to be transferred between the CPU, memory, and other devices. The system bus is typically made up of several different buses, each of which is responsible for a different type of data transfer.
Option A is incorrect because the system bus does not allow the user to communicate with the computer. The user communicates with the computer through a keyboard, mouse, or other input device.
Option B is incorrect because the system bus does not carry out instructions. The CPU carries out instructions.
Option D is incorrect because the system bus does not store data and instructions. Memory stores data and instructions.
Option E is incorrect because the system bus is a physical connection that allows data to be transferred between the CPU, memory, and other devices.