Which of the following is the component responsible for interconnectivity of internal system devices?

A (System case) is the enclosure that houses the computer components but does not provide interconnectivity.

B (Power supply) delivers electrical power to the components but does not facilitate their data communication.

C (Motherboard) is the central printed circuit board that connects all internal components of a computer, such as the CPU, RAM, storage drives, and expansion cards, allowing them to communicate with each other. It provides the essential physical and electrical pathways for data transfer and power.

D (Expansion card) adds specific functionalities to a computer (e.g., graphics, network) and connects to the motherboard, but it's not the primary interconnectivity hub for all devices.