Which of these sentences is punctuated correctly? although the concert doesn't start for over an hour; most of the fans have already arrived at the concert hall. the concert doesn't start for over an hour; though, most of the fans have already arrived at the concert hall. most of the fans have already arrived at the concert hall; however, the concert doesn't start for over an hour. even though the concert doesn't start for over an hour; however, most of the fans have already arrived at the concert hall.