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

• A、Both devices stop transmitting, 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 retransmit 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.