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.