Which sentences correct the vague pronoun problem in the sentence? Check all that apply. He kept pace with his brother as they were running around the track until he became too tired and had to stop.

Until Joe became too tired and had to stop, he kept pace with his brother as they were running around the track.

Joe kept pace with him as they were running around the track until he became too tired and had to stop.

Until he became too tired and had to stop, he kept pace with his brother as they were running around the track.

Until his brother became too tired and had to stop, Joe kept pace with him as they were running around the track