Using CSMA/CD, what are the first 2 actions performed by the sender?

Group of answer choices

1) Check if the channel is idle, and 2) If idle, start sending a frame

1) Check if the channel is idle, and 2) If idle, wait a short period of time

1) Check if the channel is idle, and 2) If busy, perform the first exponential backoff

1) Start sending a frame, and 2) Listen for a collision