The town of Stavanger, Norway, was quiet and peaceful until the early 1960' s, when Stavanger became Norway' s center for offshore oil exploration. Between then and now, violent crime and vandalism in Stavanger have greatly increased. Clearly, these social problems are among the results of Stavanger' s oil boom. Which of the following, if it occurred between the early 1960's and now, gives the strongest support to the argument above? ['Violent crime and vandalism have remained low in Norwegian towns that had no oil boom.', 'Norwegian sociologists expressed grave concern about the increase in violent crime and vandalism in Stavanger.', "The people of Stavanger rarely regret that their town was chosen to be Norway's center for offshore oil exploration", 'The oil boom necessitated the building of wider roads for the increased traffic in Stavanger.']