Refer to the graphic.Computer 1 is consoles into switch A.Telnet connections and pings run from thecommand prompt on switch A fail.Which of the following could cause this problem？（）

• A、switch A dose not have a cdp entry for switch
• B、or router JAXB.switch A dose not have an IP address
• C、port 1 on switch A should be an access port rather than a trunk port
• D、switch A is not directly connected to router JAX
• E、switch A does not have a default gateway assigned