Which sentence is punctuated correctly?
Within minutes of hearing the news, we had raced home, sure enough, our friends had just arrived and were waiting for
Within minutes of hearing the news, we had raced home sure enough, our friends had just arrived and were waiting for us
Within minutes of hearing the news, we had raced home; sure enough, our friends had just arrived and were waiting for us
Within minutes of hearing the news, we had raced home. sure enough, our friends had just arrived and were waiting for