Which statement is true about the CSMA/CD access method that is used in Ethernet? radio_button_unchecked All network devices must listen before transmitting. radio_button_unchecked Devices involved in a collision get priority to transmit after the backoff period. radio_button_unchecked When a device hears a carrier signal and transmits, a collision cannot occur. radio_button_unchecked A jamming signal causes only devices that caused the collision to execute a backoff algorithm.