Which of the following description about the bus is wrong?

Which of the following description about the bus is wrong?
A . A single bus can transmit multiple bits at the same time
B . The bandwidth of the bus (that is, the total number of data that can be transmitted in a unit of time) is: bus bandwidth = frequency x width (Bytes/sec)
C . The bus is a common communication trunk that transmits information between various functional components of the computer
D . The bus is a transmission harness composed of wires

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Answer: D