Select the sentence that correctly signals a chronological relationship.
1. There has been much debate about the safety of inexperienced drivers driving after dark; now many communities have imposed restrictions like curfews.
2.Although I do not generally like cold days, today is a refreshing change from the oppressive heat we have been experiencing lately.
3.After they got over their fear of heights, Carlos and John went hang gliding and bungee jumping.
4.Bonnie could be considered a one-woman band because she plays the guitar, the drums, and the bass, but not at the same time.