What are some disadvantages of bus network topologies?

During an annual network planning session, you’ve found a number of older Ethernet networks that are connected by 10-BASE2 coaxial cable. What might be some reasons for replacing this older bus network topology for another type (pick two)?

A) Any disconnection along the bus disrupts the communication for the entire network

B) Bus topologies are no longer supported in the IEEE specifications

C) The cabling for a coax bus is difficult to manage when adding, moving, or changing devices

D) Ethernet on a bus network is not compatible with Ethernet on other network types