Explanation:

In a computer system, the transfer of information between different units (e.g., CPU, memory, I/O devices) is primarily handled by various types of buses. The "Data bus" is specifically responsible for carrying the actual data (the content of the information) between these components. While the "Address bus" (d) carries memory or I/O port addresses (indicating *where* the data is located), and the "Control bus" (c) carries control signals (indicating *what* operation to perform), the term "information" in a general context, especially when referring to the payload, most directly points to the data carried by the data bus. "System" (b) is too broad and not a specific carrier. Therefore, the Data bus is the most direct answer for carrying the core information content.