Two devices on an Ethernet segment sent frames at the same time causing a collision. Which two statements are true?（）

• A、Both devices stop transmiting, wait a random period of time, verify the wire is idle, and re-transmit
• B、The device with the lowest MAC address is permitted to retrannsmit first
• C、The device with the lowest MAC address sends a jam signal to notify all other devices of the collision
• D、Both devices send a jam signal to notify all other devices of the collision