According to historical records, the ancient Dian Kingdom during the Spring and Autumn Period and the Warring States Period lasted more than 500 years, and its status in Yunnan history is quite important. The bronze culture of the ancient Dian Kingdom absorbed and integrated the cultural essence of different regions and peoples. The kingdom disappeared mysteriously, and no records were left in the history books after the Tang Dynasty. In recent years, thousands of ancient Yunnan bronzes have been unearthed from the Lijiashan tombs of Jiangchuan County on the south bank of Fuxian Lake. According to archaeologists, the underwater ancient city of Fuxian Lake in Yunnan has been mysteriously disappeared. Which of the following, if true, would best support the above speculation? ['A large number of bronzes have also been found in the underwater ancient city of Fuxian Lake.', 'According to archeological routines, there are tombs near the capital city of the kingdom.', 'The underwater ancient city of Fuxian Lake and the ancient Dian Kingdom recorded by historical data are located in the present Yunnan Province.', "According to experts' speculation, the underwater ancient city of Fuxian Lake is in the same historical period as the ancient Dian Kingdom."]