With regard to Ethernet media access methods, which of the following are true?（）

• A、A device waits for an electronic signal before transmitting.
• B、A device listens and waits until the media is not busy before transmitting.
• C、All devices on an Ethernet segment see data that passes on the network medium.
• D、Only the sender and the receiver devices see data that passes on the network medium.
• E、Ethernet networks allow you to configured devises with higher transmission priority.